I trained and now fly out of the club. Mostly career instructors, with the odd retired or current BA line pilot. You can be assured that the instructor you train with initally will be the same one you go back to for a re-fresh, check-out, night and IMC ratings.
Good training, although quite expensive for solo time when compared to other clubs. The location is appalling, since it is located on top of the Chilterns, and suffers from too low a cloud base quite frequently.
Well maintained aircraft, and if you have any problems they are fixed immediately; hence they don't appear to be fussy with the budget when it comes to making everything totally 100% wrt avionics, mechanics etc. In fact, this is the reason I still fly with them after I experienced some low-budget clubs.
The only other gripe is that if you don't phone up three weeks in advance for a slot on a Sat or Sun, then you have little hope of getting in the book for solo time before JH and the others beat you to it.
PM me if you wish for other info.