I did all my ATPL's at LGU, and passed the lot first time (well, except met. prac). I highly recommend the place.
It is cheaper than the rest because as a Uni it is a non-profit making organisation, and, I think, doesn't have to charge VAT. The courses are covered in depth, and not just enough to remember the right answers that you practiced before the exam.
More importantly, the Student Union sells cheap beer.