Pros: Has handled everything I've thrown at it--well, at least put into the loading tray--from CD-R, +R, RW to Blu-ray R to RE (recording and playing).

Cons: None so far, but ROM units are notorious for not lasting as long as one would expect.

Other Thoughts: Can't wait until Microsoft comes up with a patch to correct the fact that when a second CD/DVD rom is installed in a system, one has to invoke the following reg edit in Run: reg.exe add "HKLM\System\CurrentControlSet\Services\atapi\Controller0" /f /v EnumDevice1 /t REG_DWORD /d 0x00000001.. in order for the thing to be recognized.
But that's not a fault of the drive--just Microsoft, of course.

Pros: Works as advertised.

Cons: The plug-in for this gizmo is so loose that it keeps on falling off of the back of the hard drive. This is probably due to the weight of the thing plus the USB and power cord attached to it. Just a slight movement of the assembled unit causes the adapter to either become loose or fall off.
Having metal and woodworking skills and the appropriate tools, I was able to remedy this situation. Otherwise, we're talkin' duct tape to keep this thing attached to the rear of the drive if you don't have these skills.

Other Thoughts: I would give it five stars if the folks who designed this thing would have thought about making the attachment secure. By the way, you can PERMANENTLY attach the adapter to the hard drive with a judicial application of SuperGlue if you get really frustrated with it falling off--but be sure and not get excess glue on the electrical contacts.