If its of any help I've attached a picture of the Bones Ogre I've painted. Its only the second plastic miniature I've ever painted so it was certainly a new experience.
Yes they are bendy, but my mix of old citadel paints and Reaper MS paints stuck to it with no problem. Took varnish with no problem either.
The mould lines are apaint to clean up, and the plastic is fairly soft. Certainly not a hard rigid one.
However all that said, I've sold loads of these and not had one complaint. The material works best with the bigger miniatures but it also reproduces small thin sections very well. They're just more bendy.
I'll have the whole range available to pre-order from the 22nd July, so if you want to pick a few up please feel free. I also have most of the first 30 releases in stock now. The purple worm and werewolf seem to be the favourites at the moment.