I was delighted with my old model WD My Passport, so when I needed another USB drive I naturally went for this one.
It is even smaller than the previous model and looks good, BUT... It uses a micro USB plug rather than the earlier mini USB and it fits very loosely with a lot of lateral movement. The slightest movement on the cable will cause the connection to be broken resulting in read/write errors and cable can also just fall out. Other micro USB cables that I've seen have small grips that give a firm connection, but this doesn't have any form of grip. I find it unbelievable that this could get through WD quality control.
The emulated CD which has the lock utility was also unexpected and it needs drivers to be installed from there for the main drive to be seen on my Vista machine. This is also a pain as you need to install the drivers on any machine to be able to use it.
If the cable problem was fixed I'd probably give it four stars. Micro USB cables are not so readily available.