Well, frustratingly enough after under a year of use, mine has given up the ghost, I wish I had paid more attention to similar stories when I was making the purchasing decision, I just took the old, 'it won't happen to me', mentality, it didn't pay off.
We'll start with some positive points, yes, it is very attractive, the design is sleek, and it matches all the aluminium Mac products, (read: all but the white MacBook currently).
Also, it is very quiet, and the speed over FW800, (which I was using with a MacBook Pro), is bleedingly fast.
However, all this is good and well, but not when the product stops working. My problem is as follows, I noticed one night that it was starting up repeatedly, on it's own, attached to the MBP, but that was 'sleeping'.
I thought this was strange so held down the power button to force it off. Then, ~5mins later, I heard it powering up again, and again and again, the one loud noise it makes is when it starts the hard drive going, the accelerating of the motor, (I would guess), and it was doing this constantly. It was late, so I just unplugged it until the next day.
The next day, I plugged it back into my Mac, and it was doing this constantly, still. The problem with this being is that if you are using it and it cuts out every minute, then the transfer is effectively cancelled, so you are really quite screwed, (excuse the term), with using it at all. This applied particularly in my case for time machine backups on my Mac.
The reason this is particularly frustrating is that all my files are still there, you can access them for short periods of time, and in fact, whilst I was preparing to send it off for replacement, I managed to get a few files off that I really wanted to keep, but now I am without backup until the replacement arrives, which I may sell on and get a new drive, because I cannot be bothered to deal with the same problem again.
Anyway, just my story, I am thoroughly disappointed with what is a fairly expensive product, (more so when I bought it a year back), to have such a quick 'death'.
I would not recommend this product, but would recommend thoroughly reading reviews here at amazon, and elsewhere too, to avoid this disappointment I had.