The only guys I know who lose everything when they come off are the ones who don't know how to train properly and don't know a thing about proper nutrition.
When you come off you lose the super freaky fullness and strength, but I've never looked "bad". You just slowly transition back from a kickass 15 week cycle to natty status with a bit more permanently added noticeable muscle from your previous cycle.
I know this is an unpopular opinion here, but post cycle, continue your 5 meals a day, train your tits off 5 days a week, and you will keep much of your gains. (crazy talk, I know.)
*i don't use big doses though so maybe this is different for the heavy users?