I can only reiterate what has already been said about BGS, they are very good. I'm half way through the course with a 92% average on the first 8 exams. Going back in October for the second set.
I can't fault anything in the way BGS work. The distance learning program is excellent and their instructors are excellent, their admin team is brilliant too.
Having the two week brush up course in cheddar is also quite helpful, because it's a very quiet little place (particularly in winter) it's pretty free of distraction!