BCFT have a good rep... Actually did my PPL about 9 years ago at Bournemouth flying Club accross the other side of the airport.
Started my ATPL groundschool with them in 2004/2005. No probs with lecturing at all and all very helpful..
Results were good, 13 1sts and 1 2nd attempt (thats what you get for going out for a few drinks the night before though so only myself to blame). wizzed it the 2nd time with no probs
From there i went onto Hour Building, CPL, Multi, Multi IR, MCC & FIC and became an instructor with them for 6 months before getting a job a month ago.
Best advice is pop down and visit Dena... she'll show you around and introduce you to some of the instructors there. Also have a word with the current students.. They'll tell you what they think as well
