For me the real advantage of the London Met course was its structure.
The exams are tackled in 3 modules rather than the normal 2 so there is less short-term cramming involved as you take the exams in 3 sittings speading the workload more evenly.
Also this means that the revision courses are only 3-5 days long rather than the usual 2 weeks. This for me places considerably less pressure on work commitments (the reason why I am distance learning rather than full time). I could not take 2 weeks off work for the compulsory classroom based learning followed by another 3 days for exams without causing problems with my employer (and the Mrs for that matter)
I have no doubt that Bristol's notes may well be better (I have their CD) but how the distance learning course is structured at Bristol unfortunately ruled it our for me.
+ I live in London so London Met is easier for traveling as well!