EIDE/SATA USB adapter cable, good for forensics?

This product looks like it could really be nice for acquiring images of suspect hard drives.

One interesting feature is that you can connect both the EIDE and the SATA drive at the same time. I guess it could be a bit slow trying to acquire an image when both the source and destination drives are on the same USB port, but on the other hand it's a lot more portable than a full tower rig, so things might balance out.

The obvious problem is the lack of an integrated write-blocker, but I guess you could use your own along with this device.

Anyone tried one yet?