i have used it for playing techno, but it is not the best piece of kit for this imo. the 1k is a great, solid sampler/sequencer but the prospects for freaking the $hit out of sounds is very limited - as mentioned above, the Korg Electibes are much better for this sort of thing. I also find the lack of a freeze function for track mutes when switching between sequences very limiting when playing live.
Having said that, with enough other kit and using it intuitively the 1k is undoubtably a great piece of kit for making ANY sort of music