I'm not a BAFC customer, except that I own a share in an aeroplane on the same field, so I think they're getting our rent money.
It's worth mentioning that there are two light aircraft schools on the site: BAFC (mostly teaching on Pipers) and Wycombe Air Centre (mostly teaching on Cessnas). So far as I can see both are providing an excellent service to their students & students and running very well looked after aeroplanes. (I have done a few training hours with WAC, and the instructors and aeroplanes were very good).
On that basis, if you are looking at learning to fly at Wycombe, you could do far worse than looking hard at both schools. The distance between them is around 2 minutes walk!
And whilst you're at it, if you just want to fly, there's a gliding club in between them who also seem to be doing a pretty good job.
G