I have the stc1000, so far I haven't done anything incredible with it,
but it definitely has a ton of potential. The unit is extremely
solid (seriously. the top of the thing is ~1/4" thick aluminum).
The device is capable of 512x512 resolution but currently is limited
by MIDI. I think they're working on a middleware application to fix
this. I think the response time is supposed to be in the range of
7ms. The patch design software is also very usable.