I'm currently on the APP at OAT - a year ago I was deliberating over whether to go modular or full integrated, considered lots of advice and decided integrated was going to be the best for me. It doesn't suit everybody - there are lots of people who have to stay back a course or two in order to get the results they want, and at times it can feel quite competitive. But I have absolutely no regrets and am looking forward to finishing in the next few months and looking for work.
I have friends finishing every few weeks at the moment and am amazed at how many are getting jobs.....and quickly too! OAT is recognised as a very good school and I don't think you'd regret embarking on the APP course as long as you can be sure that you will give it your best shot (and have a nice bank manager!!!). At the end of the day it is an expensive way to do it but whichever route you choose wont make a difference in the grand scheme of things!