If it was a choice between Andrewsfield and Stapelford, I'd go for Andrewsfield. I have only been there a few times but it just has a nice 'club' feel about it, and has highly rated instructors from what I have heard from other people. Stapleford is probably very good for the CPL / IR cadets, but the reception staff (not any individual instructor mind you), are a little unwelcoming in my experience. It depends on what kind of scene you like and what facilities, training or aircraft you need.