This is an awesome concept and the reviews of it on Newegg were overwhelmingly positive, so the thing does work. (Thanks to Poke and Smith for the heads up !)
I am so sick of flakey external enclosures and needing one enclosure for each drive (otherwise one has to do the whole procedure of opening up the enclosure, unmounting the current drive, mounting the other one, etc - obviously not practical just to see a movie that happens to be on a different drive than the one attached to the 622). I also tend to buy cheaper external enclosures, because at this point, as drives get cheaper, the enclosures are approaching the prices of the drive. ($30 for a good quality enclosure vs $50-$80 for a drive).
Hopefully, this has a top quality chipset that works reliably with the 622, and then that issue will be solved permanently. :up
I now use hard drives to backup data from my PC as well, so I may get the new esata version for my PC when it comes out (no need to get that for the 622 since it doesn't support esata).
By the way, if - like me - you prefer Newegg, they also have a $10 mail-in rebate that expires in a few hours.
Otherwise, the Microcenter rebate is good until June 1st.
Note that this is not for you if you are a "butterfingers" as the hard drives will be "naked" - without the protection of the cases - or if you often have a lot of static electricity in your house (so be careful and touch a faucet before changing the drives).