I assume the new BGS offering has only just come online? I had previously been told that ATPL onlinea and BGS were ending their association, so it's no great surprise. Will take a look at it...
That said, ATPL online was pretty good for my last lot of exams. Lots of JAA quetsions are still floating around. Aviationexam.com is also good for capturing the new EASA questions, and was recommended by a member of staff at my school.