(didn't I see two of these threads with the same title yesterday?)
I have the HyperDrive and know a few others that have it, and all can vouch and highly recommend it. Only thing I didn't like was to see a WesternDigital drive used in it that I bought 'pre-configured' from them (120Gig'r) ... I just haven' had luck with WD, but the reality is all mfgrs probably have the same rate of failure. You can just buy the shell and put your own drive in it.
And lol... I did have one 'incident' in Africa, where on the last day of wildlife viewing before the end of the 10-day Journey, after over 3500 RAW images had been off-loaded to the drive, I received a "HDDDeviceNotFound" message after plugging in the card. EEK
I took the card out but the same thing. I decided the old "Apple II fix" might be due. I tapped the unit on edge on my leg, flipped it around and did it again. Worked after that!
You can't imagine the violent bouncing around you get in those Landrovers. The drive just needed a slight re-seat. I'm sure the 4 or 5 times I opened it up and took the drive out before I left on my trip doesn't help; when I didn't know what could be keeping the unit from charging back up; drive? battery? electronics? so just started 'messing' with things. If you buy it and leave it, you will probably be w/o incident.
Regarding what I mention @ the end of the paragraph above... In the 1st week of ownership I had an 'incident' I turned out to have cause, deeply running the battery down by leaving the card in the device (which keeps drawing power to keep a charge in the card I think? watch out for that and don't do the same!), and couldn't get it re-charged. I was upset I couldn't call them as their phone number wasn't on their website. I then wasn't getting e-mail replies from them. After a few days I got quite huffy and started sending 'nasty-grams'. The owner of the US distribution ended up calling me after I provided my phone #, stating they'd been replying... etc. Turned out Yahoo mail's spam filter had been redirecting their reply to junk mail and upon looking, there they were, and my Invoice was supposed to have their phone #, but didn't (they should have corrected that by now). In the end they sent me an extra rechargeable battery, and external battery charger specifically for that type of special battery. I offered to pay for them, but they wouldn't have it. The person who 1st recommended them me had nothing but great things to say about their support. With those unfortunate mis-communications out of the way, I have to concur with him; great support.