Pros: Faster than previous version and now has a gigabit Ethernet port.
Fully compatible with older TP-Link powerline adaptors including secure networking mode.
Smaller than previous AV500 models and do not block the other plug on the wall.

My home network consists of a wide variety of interconnected subnets, including a cable modem to the internet, multiple gigabit Ethernet switches, 802.11a/b/g/b/ac, and powerline Ethernet. I have been using TP-Link AV-500 (TL-PA411) devices to get network connectivity to multiple areas of the house where wireless connections are either weak or not usable at all, and I've been very happy with their performance. When I received this new AV600 kit, I knew I could immediately put the upgraded features to good use.

Before installing the new adapters, I re-tested the existing adapters. Then I installed a new adapter at the most remote computer I Have and tested a single AV600 on the existing network, and then I installed the second AV600 and tested performance between two of the new adapters.

In a nutshell, IT WORKED PERFECTLY!

AV500-AV500:
One way: up to 30mb/s (3.9 MB/s)
bi-directional: max of 2.4 MB/s in each direction

AV500 - AV600:
One way - up to 66 Mb/s (8.3 MB/s)
bi-directional: max of 2.5 MB/s each direction

AV600 - AV600:
One way - up to 95 MB/s (11.9 MB/s)
bi-directional: max of 3.5 MB/s each direction

So as you can see, even though the difference between the adapter ratings was only 20% difference, in some cases I rsaw over 300% the speed when using 2 of them, and over 200% the speed when using just 1.

In all cases, the transfers were both faster and more reliable than the wireless network connection available at that location in my house.

Cons: If there is any drawback to these devices, it is that 2-way bi-directional transfer rates are not very good with these adapters. I'm not sure from the tech specs, but they behave as if they are only half-duplex units so when there are 2-way transfers going on between adapters, they have to take turns instead of all going simultaneously. I have not tried more complicated scenarios than 2 computers transferring to and from each other, however I suspect that multiple computers trying to all stream large files or high bandwidth streams to each other all at once might see some slowdowns. There is no true substitute for a dedicated wired network with a good gigabit switch at its heart if you have multiple computers moving large files or streaming HD content around, but if that's what you need then you're not really looking for these powerline adapters anyhow.

Other Thoughts: So, a summary.

Unboxing was unsurprising. The product came as advertised in a smallish box without too much packaging waste. In the box were 2 adapters, 2 short Ethernet cables, a mini sized CD with some management software I didn't need to use, and a quick setup guide.

I should note that I've heard that the software can be very useful tweaking the settings of these adapters to get improved performance, to make firmware upgrades, or to fix performance problems. I've been so happy with them right out of the box that I just haven't tried out the software yet.

Installing it was very simple, and even though it was a different model from my other powerline adapters the normal process to add the adapters to the network worked just fine on the first try. My gigabit switch recognized the cable connection as gigabit speed too, a nice upgrade from the previous model which removes one potential transfer bottleneck.

As a standalone product, it has outstanding value and can be greatly superior to wireless especially in congested wireless areas or in large multi-story houses. Just remember that you can't use these on powerstrips and you get the best results on the same wiring circuit within the house. As an addition to an existing powerline network setup, it was fully compatible even in encrypted secure mode with my AV-500 (TL-PA411) devices, showing minor improvements across the board when transferring between dissimilar adapters and very large speed improvements between the two new AV-600s.

In short, I highly recommend these devices for either setting up a new powerline network, or adding devices to an existing compatible TP-Link powerline network. Just remember to keep them off the powerstrips and don't expect miracle 2-way transfer speeds especially if they're not on the same wiring circuit.

Pros: I like this drive a lot. Not only does it have the dual USB connectors which makes this an incredibly useful tool to transfer files to and from tablets and phones, it also has other features that I look for in a USB Drive.
First, the end caps are the kind I like. They protect the connector from damage but retract instead of removing completely.
Second, the size and shape is perfect. It is about as small as you can get without being impossible to handle with my medium-sized fingers, and it is fairly business-like.
Third, the little ridge on the end caps used to pull them back out is just the right size, and doesn't feel flimsy to me.
Fourth, unlike some badly designed caps, when you push the drive into the connector port it doesn't collapse the cover back over the connector. You can push it right in without the end caps changing position, which makes it very easy to get a nice secure connection.
Regarding speed, it performed pretty much as expected for a USB 2.0 device with write speeds up around 18MB/s and read speeds around 22MB/s.

Cons: People who throw these drives into pockets or other places where dirt or lint collect may find that the end caps aren't sufficient. Since they retract instead of coming off completely, they are open-ended. That means they will let dirt and lint accumulate inside the connector if you aren't paying attention. It's nothing a little compressed air or a small brush can't fix, but it could be an issue for some people who need fully enclosed end caps.

It would have been nice if it was USB 3 not USB 2. As you can see for yourself it costs about as much as many USB 3.0 devices, so the extra you're paying for is the extra connector. It's worth it in my opinion since if you need something like this then it is totally worth the price, but still, USB 2 devices need to go. They're old and slow, and there's something better for not much more money. It isn't worth taking off an egg because you're getting exactly what you paid for, but...

Also, the thumbdrive packaging was very difficult to open, something you'd think manufacturers would have figured out a couple decades ago. The packaging is HUGE compared to the size of the thumbdrive, and you'll need scissors or a knife to get it open. Wasteful and irritating. I suppose some retailers need the packaging to be big and hard to use to prevent theft, but come on SanDisk, this is the internet age. Get with the program and quit with the wasteful packaging on items sold online.

Other Thoughts: Do your research before buying because some tablets and phones won't work with these things (or any USB drive for that matter). For example, the kindle fire specifically excludes drivers necessary to use these drives. This drive works great on my phone and on my brother's phone, but doesn't work at all on my kindle fire. If you get one and it doesn't work with your tablet then not all is lost since it is a fine USB drive all by itself, but you should probably look up your tablet/phone first to make sure it is compatible with USB flash drives.