Pros: When this has a full charge, I can fully charge my iPhone 4S (with a near-dead battery) twice before having to recharge it. I would guesstimate that it takes about 1-1/2 to 2 hours to fully charge my phone. I actually bought one of these at a store last year and paid $50 plus tax (which I thought was a bit steep) but when I saw these go for only $17 here, I had to snag on three more, one more for myself and two for Christmas presents. This thing is great for when I have to charge my phone and can't be away from it like when I'm expecting a call, I can just take it with me. The convenience factor is awesome. If you travel and/or are always on the go, you have to get one of these, it makes for some great peace of mind when you have this as a backup way to charge your phone when no outlet or other source to charge your phone is available.

Cons: None, but I do wish this would charge up faster, it takes (though I never timed it) at least six hours to go from dead to fully charged.

Overall Review: When you connect it into your phone to charge it, don't forget to press the gray button on the Targus charger to start the charge. It's can be used for any smartphone, just plug your data cable into the USB port on it.

Pros: I installed it in my new build and it was recognized but Windows 7 didn't have the drivers for it so I had to install the drivers using the mini-cd disc that came with it. I did not plug anything into it at first until I had the drivers installed but did afterwards and haven't had any issues at all. This was put in an ASUS Z-87 Pro motherboard with an i7-4770K, 16GB RAM, etc.

Cons: No instructions whatsoever. Just put it in, connect power to it from your power supply (if it doesn't have a molex connector, just use a sata-to-molex adapter), install the drivers with the disc, then plug your USB cords into it and you should be fine.

Overall Review: Shipping was slow. I have a ShopRunner membership for free two day shipping but this took like five days to get to me.