Overall Review: It's super fast, bright and usable. I'm happy with it. Comes with Windows, but I got rid of that and ran Ubuntu 20.04 Linux on it. A few issues that are resolved in later Linux kernels, but it's usable out of the box.

Pros: It looks like probably a nice card for Windows users. I believe that the SATA side of the board probably works with Linux, using the ordinary generic SATA driver, but I have not tested that.

Cons: You can plug PATA drives into this board, but the Linux system will not be able to access them. I tested this in a Gigabyte Ryzen motherboard running Ubuntu 18.04.2 LTS. There exists a pata_marvell driver in the Linux kernel for years, but it does not support the "IDE interface [0101]: Marvell Technology Group Ltd. 88SE912x IDE Controller [1b4b:91a4] (rev 20)" chip used in this board (which is apparently an 88SE9128 chip specifically). Even on the chips that driver supports, it doesn't use DMA, it's just a very simple shim. Apparently, Marvell never provided enough information on how to program the PATA side of these chips, so no Linux developer ever wrote more than a skeleton driver. Yes, I tried all the suggestions from the Marvell driver database and the little slip of paper that came with the board. None of them worked for accessing the PATA interface from Linux.

Pros: Compact and powerful (though heavy). Charges a laptop. An early product that supported USB-C Power Distribution, and at 60 watts as needed for laptops.

Cons: Product failed after 18 months. Lights danced but then went out when I tried to turn it on. I have started to suspect that it self-discharged because its symptoms seem to match an almost-dead battery. In that state, it would not accept charge from USB-C, but I discovered it would accept it from a USB-A charger with an A-to-C cable. After I posted about the failure as a 3-star review, and sent TechSmarter an email asking what my options are for repair, the company responded. They offered and sent me a new replacement, which is working fine. I have updated this to a 5-star review. The brick wouldn't keep the power on when the device being charged doesn't draw very much power (such as a USB LED light that is dimmed down, which I use for tent camping). This is still true of the replacement brick (they haven't improved that in the firmware in the last two years).

Overall Review: Superior after-sale support made up for a product that failed after 18 months.

Pros: a nice doorstop

Cons: Would never power up. The drive also required special cabling because of this foolish SATA spec change about spinning up. But I changed the cabling and it STILL wouldn't spin up. DOA.

Overall Review: I had always lucked out with "refurbished" drives before. Not on this one!

Pros: Recharge with an ordinary USB-micro cable. Full 1.5v unlike NiMH 1.2v. Bright and lasts.

Cons: More expensive than batteries which need a charger.

Overall Review: Yeah!

Overall Review: Works great. It replace the similar one in my wall that controls a bathroom fan and lasted for more than a decade.

I recommend this seller.

That sums it up. They are not only slow, they are incompetent. I ordered a USB2 hub with an Ethernet port included. Nothing arrived. I inquired by email. They said, oh, it's waiting in the Hong Kong post office (apparently they sent this tiny item by slow boat -- literally). Finally, 29 days after I submitted the order, it arrived -- and it's a USB3 hub, not the Ethernet hub I ordered. I do not recommend using this supplier.

Ordered 2 packs of AAA batteries on June 1. They shipped June 3. Delivery date: June 10!!! Unless you don't need the stuff anytime soon, try a different seller, or pay for fast shipping.