The bolts are crap, better than most of the other stuff. The head aim is the only good one and you can easily avoid it by switching helms. The leg one is only good if you want to kill someone without them running away. the torso one doesn't do enough damage to be worthwhile.
I like thier range strangth, but I don't like thier special. I don't think that they are going to be extremely effective in pvm or pvp situations and people should continue using older bolts.