Hi,
I went to MFC between March and June this year to do a ppl which was not completed in time however I went back in august to finish it off within a couple of weeks. The weather was not fantastic between these times for me however weather does change. Alot of snow and high winds however you do get crystal clear days when it is very cold. I have been talking to a friend of mine there at the moment and the weather does'nt sound great but as i said this can change.
JAA instructors are very good and aircraft availability on the cessnas tends not to be a problem and maintenance of aircraft is good also.
If you want any more info don't hesitate to ask
Chris