Don't know much about Goudemand, but so far Smith's signings have been pretty good.
McDonnell, Macdonald, and Lisone (now that he's fit) all look great.
Sangare is a bit more of a work in progress but he hasn't really let us down, and gives us a bit of much needed size and impact in the pack.
Olpherts obviously hasn't worked out, even if not a player who would make it into our first 17, he should have been better than he has been. Can't really comment on the lower league signings because we haven't seen enough of them yet.