I completed my CPL/IR with them late last year. Excellent school with great instructors. Try and get Jonathan Said for your CPL.......... by far and away the best instructor I've ever met.... oh, and try not to get Colin D for your 170A flights.......... by far and away the hardest man to please I've ever met (just kidding, he's a pussy cat really).
I never flew any of the test routes for practice or went to Cranfield (except in the sim of course) before the test as there really is no need at all, though I understand that some more recent students there have practiced a few of the routes in the aircraft.