I've only just received this, listed as "Toshiba USB 2.0 Portable Hard Drive" in the 500GB size. It has a very cool design, the case is similar to my 5G 30GB iPod - a smooth, flat front/top with a rounded back. It has a nice discreet blue activity light in one corner of the top (i.e. front) surface that is on for power and blinks for activity. The USB2 connection is a micro style and contrary to another review is a standard cable - this micro style is quite common, I have it on my GPS and camera so can use the same cable for all 3. The cable supplied is a short single cable (i.e. not a "Y"), and my Asus netbook powers it with a single USB port. The drive (like all of them) is just plug & play - plug it in, the computer sees it, and you're off. I reformatted it to a single large NTFS partition, 465GB (drives are always sold with powers of 10 "GB", i.e. 1GB = 1,000,000,000 bytes (10 to the 9th power), whereas computers use powers of 2 "GB", where 1GB = 1,073,741,824 bytes (2 to the 30th power). I don't like this sales speak, but Toshiba do clearly state the difference in the very short instruction sheet - to their credit.
The drive comes with NTI Backup Now EZ. I already have a backup strategy (using xxcopy, I recommend it!) so have no need for this. It's well reviewed though.
4 stars rather than 5 because I don't know its reliability yet, and it's not quite as fast as I'd hoped (but still fine).
The main reason I got this particular drive is that Toshiba have a 3 year warranty, and the others all have just 1 year. And $90 with free shipping is a great deal!
I also got the Kroo Portable Hard Drive EVA Case, it fits well - just enough space for the drive and short USB cable. It's a semi-hard case, but very little padding. Much better than leaving the drive naked but I wouldn't want to drop it!