Its way more than uvmapper.

while having the ability to map (I dont have a lot of experience with hex' version of this) it also models and can double as a sorta "z brush". 

so in my opinion, its a combo of amapi designer/uv mapper/z brush

its got potential...but, it is unstable.  Unstable in that it crashes when it doesnt get the input it expects.  At least, thats how Ive been crashing it.

 

BT