Hi, Still much of a newbie at PPC's. I've been trying quite a few of the PPC engines and find some of them need to improve their interfaces.
Either they use wording that doesn't explain well enough or the navigation is very poor. For example, just to make a keyword change or bid update, they make you go round and round to find how to do it.
The engines I find very easy to use are, goclick being the best so far, findwhat easy but a little clunky, Searchking terrible.