Just have to add my views too. Having used the PPSC notes for the CPL tech exams earlier this year, I was talking to a couple of Bristol students on the exam day and they showed me the Bristol notes. Needless to say I used Bristol notes for the Navs. Did the two weeks brush up course earlier this month and exams two weeks ago. After passing 8 out of 9 at first attempt then the material must be clear and concise. I'm not exactly the brightest person ever to be let lose in a helicopter.
To rubbish Bristol GS, Alex and co, then there is obviously some other 'personal' reason for it.