Hi Ollie, I'm in a similar situation to you, I have a PPL and have been considering going for my ATPL for a few months now, I was looking into training at AFT once I got my ATPL exams sorted.
Their prices do seem to be cheaper than anywhere else I can find, I'm wondering if that's trying to tell me something?
I figured I'd go there to do a shorter course first such as the night qualification, and see how it goes. If I like what I see then I would consider doing my CPL course there too once I get to that stage, but I'm told that Bristol is the best place to go for groundschool training (distance learning).
Anyone else had any experiences good or bad with Atlantic Flight Training, I'd be interested to see what any of their former students have to say?