In reply to Roberttaylor:
They're great in icy cracks and just in general, I use the cheap Viamont tri-cams which unfortunately can't really be placed passively due to the orientation of the wire, but I rarely feel bad about hammering the crap out of them.
The wired Viamont cams can be a little fiddly to place with big gloves, especially the smaller sizes and I can't speak for Camp tri-cams, although they have the added benefit of being designed to be placed passively too!
There's also something satisfyingly comforting about a well set tricam.