The top case half on the reviewed unit was made of plastic. On the newer model, it only offers one top, and the case is all aluminum, which will conduct heat away better. The plastic case is sturdy enough, but it does not feel that it is securely attached. I would suggest that one be careful about only handling the unit from the sturdier bottom half.
The documentation was in conventional English and accurate. Having a paper manual is almost a luxury these days, so cheers to RocketFish for that.
I also tried starting the drive up via USB on two ThinkPad notebooks and a tower multimedia PC. Reads and writes were fine, and the cables and connectors did not appear to heat up. Nor did performance seem to change when I plugged in the wall adapter.
I think it's likely that they switched to the USB y-cable because some laptops have low-powered USB ports. Having two USB ports in use allows the device to go mobile without worrying about the power adapter. Fortunately, both my laptops seem to power the unit fine with the single-ended cable.
Here's what the device looks like assembled.