Pops on over-run with a decat, but theyre forced pops (i.e. u have to dab the throttle to make it over-fuel slightly) - still sounds good once you learn to to do them at will though!
Realise I probably sounded a bit negative in my last post, I should have mentioned that when youre going for it, it sounds superb - its just between 3-4k revs that it drones and resonates a bit, particularly on the motorway. Mine hasnt got the rusty look either and Ive had it for well over a year.
Luc
*edit* - yep, like roamer said, it pops on hard/fast gear changes which is always amusing when youre overtaking!