I have four of them now
Three different brands, the last three were bought only on the basis of price per Gb.
So far I've had no problems.
The only comment I have would be that a power on/off button on the case is good to have, but not all drives have one.
The other thing I have noticed is that some power transformers seem to run quite a bit hotter than others even on idle - with the drives powered down. Thereby wasting your money.
But you can't get that sort of information on the box.