Apparently the M5 is an either "love it" or "hate it" camera.
The friend I bought my first M, an M3 from recommended I try an M5. It was love at first site. I had been shooting Nikons so although it took some getting used to in order to shoot the M3 intuitively, the M5 immediately felt right. Also, the in-frame metering felt much like the FM I had begun on as a student years prior.
Probably most important to me though, was that the three lug version I own has frames for 28mm, which is what I shoot most of the time.
Needless to say, I am one of the "love it" M shooters.