Pros: Using these in our PCs makes it easy to do backups at full SATA speeds without the need to open the boxes or use eSATA connections. Given the sale prices Newegg frequently offers I actually use another in each PC to hold the system drive as well, just because removing or swapping the system drive easily is convenient once in a while. Have never had any problems with the 5 that I already own nor with the two black ones that I bought before them, and significantly prefer them to alternatives that require mounting drives in caddies that I've used in the past. Nice rugged cage, though connectors may be fragile (see below). Attractive. Less expensive when on sale or after rebate than any other cages I've ever seen.

Cons: None for me, but possible ones include no fan (the aluminum cage conducts heat away well, our boxes have good air flow, and the cage has a mounting point and power connection for a 40 mm fan if you want to add one), potentially fragile connectors (comments for the black version say that when you attach the internal cables it may be wise to have a disk locked in the cage to give the connectors added support, though I tend to handle connectors gently and have not encountered any problem myself), and I have one drive (an old WD Black) whose connectors aren't quite ideally aligned when it's inserted and that thus requires some care in inserting.

Pros: Great price (at the moment), fast shipping.

Cons: If you order this you may instead get the 4 MB cache version (as I just did last week) which Newegg has been shipping under this product description for years (they say that there's no reasonable way for them to test the units that ASUS sends them so they just pass them along to the customer). The reported difference between the two is that the 8 MB version is made by Lite-On and the 4 MB version by LG, and many people believe that the LG version generates most of the problems that get reported here (which is why I asked Newegg to pay the return shipping on mine, which they did without demur; the 8 MB cache version that I bought about 3 years ago is still working fine, and I wanted another just like it).

You can use the free ImgBurn utility (Capabilities section) or the trial version of Opti Drive Control (Drive Info section) to view the drive's cache size, firmware revision (the Lite-On's is 1.03, the LG's is 1.0), or model number (the LG's has an 'a' appended at the end).