i'm so far happy with my 40d. if you have any f2.8 lenses , imo you can really see the difference in the focus system( at least from my rebel xt) and i love the burst speed. it hasn't been very hard to switch over since most of the buttons that you use without looking are in the same area as they were on my xt, only one i keep hitting wrong is the "af on" since it's where the ae lock was on my old one.