i am nearing the end of my distance learning ATPL course with them, and have found them very good. their set up suited me better than any of the others, primarily because they only require a 2 week residential segment, whereas others require 4.
their notes are comprehensive (although not too many colour pictures, but that never bothered me), which tends to put some people off, because they only want to learn what is needed to pass the exams. however at the exam prep week they focus on what is more important for the exam, the feedback is excellent, and they have always promptly responded to any email/phone call enquiries that i had.
no matter how good or bad any notes are, it all boils down to how much comittment and effort YOU put in
so from my experience, i have been more than happy with them.