LGU notes are a bit wordy, but the main thing is to beg, borrow etc. all the feedback questions you can get your hands on. This is likely to be a key factor that will get you through the exams.
Stapleford I found to be very good for both my CPL and IR. The 152s are only used for PPL and hourbuilding. The CPL and IR work is done on Warriors, Arrow and Seneca. The bottleneck tends to come with the fact that they only have one decent Arrow that is used for both for CPL work and initial IR work. Overall, I would recommend Stapleford as a high quality outfit that is very focused on getting people through professional flying tests. Good luck!