Student pilot out of YBAF, have travelled through AMB many many many times and can't say i've ever had a real problem, except once when they offered me a ten minute wait and being a pretty inexperienced pilot i decided not to wait, blundered around and slipped into airspace by accident!! Controllers were really good in this occasion when i explained that i was a training pilot on a training flight and guided me back through without a real fuss even with C-17s buzzing about! And none of the clearances given to me have been unreasonable nor have i been unable to comply with them even with my low experience.
Real big thumbs up to the AMB boys and a girls in ATC who have to deal with a fair bit of student traffic bumbling through on top of the usual VFR, you do a great job, a number of times i've even gotten a pretty good close look at the C-17s and F-111s which is a real testament to their ability to squeeze us through and reduce delays!