Hi, I've finally wore out my Conti Contact Sports, after a while too many little cuts and the tread wore down which meant increased punctures... very good tyres though. I didn't find them too hard to get on and off... but my rims are pretty good like that.
Also, like a few other continentals... like gatorskins, the side wall seems to weaken over time... and eventually you get the tube trying to break out.
Anyway, trying some new Maxxis Columbieres.... so far OK used them for commuting to and from work for a month now. They are cheap, pretty fast but I'll let you know how they wear and what the puncture resistance is like. They were only $22 each.