The M3 with the 22 pancake definitely focuses slow. I have a 2yo and if he's moving around at all, it is extremely difficult to focus on him and get a decent shot. I expected it to be slower than my DSLR, but it isn't much faster than a point and shoot in my experience. It focuses a little quicker with the 18-55. Using my L lenses on it with the adapter have been pretty much a fail. Much slower focusing. For that purpose, I've been very disappointed by it. But, for everything else that doesn't need fast AF, it has been great. Small, light, good IQ, hot shoe, touch and flip out screen, etc.