Ian,
I got one a couple of weeks ago and played down at Dragons Lair on Sunday with it.
It was sweet. A huge improvement on the stock trigger frame, and I recommend it.
In terms of fitting it............piece of p$ss. As long as you've got your allen keys it couldnt be easier. Remove the grips, pull out the two wiring clips, remove the board, undo the frame. Fit new frame.
Easy peesy!
Want any more info?
jasonsinclair@yahoo.co.uk