Does exactly what it's supposed to do. Grinds everything completely without leaving pieces. Ice and nuts, which other blenders have trouble with, also destroy these completely. Cleaning can also be done very quickly as you only have to clean the cup and the blade. Handy if you want to make a smoothie/shake quickly. The supplied accessories are very handy, but I use very little myself. This is especially useful if you take the shake with you. I almost always drink it right away, so the accessories are unnecessary for me.
As a minus I could say that it is a fairly heavy device for its fairly small size. So if you're planning to take it with you, I'd keep that in mind. The device also smells quite quickly when you use it. This is a burnt smell coming from the device. I don't mind that any more.
All in all, it's a handy blender that does its job and doesn't take up too much space.