Hi B767PL, Ive only done the first 8 so far but passed them all with a good average, I read the manuals first and done the progress tests online (as you do with bristol)
There after i hammered the question bank till i was bored and until the vast majority of the questions were done, whilst going through the manuals again to make sure i understood it.
I wouldnt reccomend doing solely the question bank, the manuals are there to be read and understood, and if any trick questions come up (that you havnt done) will help get the right answers.
I cut alot of shifts and went 5 days a week for a few hours a day. I only done this cos i had money saved up and understand that people have full time commitments with work, and its up to the induvidual how long they take studying.
as for the question bank go on the BRISTOL GROUND SCHOOL website and theres a link to the question bank site, its £50 for 3 months access and a great help.
www.atponline.gs
Good luck with it all mate!
Dougie