Summary: This case is multi-purpose. I can hold two Seagate hard drives in the pockets because it expands. Also, whenever I travel, I typically store my flash drive in it with the external drive and its cable. Worth it.
Summary: UPDATE: I have now upgraded to a WD My Passport Ultra 3TB (WDBBKD0030BBK-NESN), it fits appropriately, and now I have had this case for about 4 years. I have used this case with many hard drives, currently with a 2TB My Passport from Western Digital (WDBY8L0020BBK-NESN), it feels solid, well padded...
Summary: EDITED: 04/16/2009 Well, even though its pricey and it'll not make ur drive "pocketable" any more, still it's a good Case and I will definitely recommend it for "protection" of your drive when you are in "travelling" mode!
Summary: This is a perfect size case. I just purchased the Iomega 160g passport drive and this case seems like it was made especially for it. It has a slightly hard exterior, great for protection, and a good pouch for the cord. I highly recommend this case.
Summary: I bought this case because it was "advertised" along with the external hard drive I bought (Verbatim Insight 500 GB 2 USB), but alas, the hard drive is too big for the case. It's a really nice case--for a smaller hard drive.