SWIM just tried some meph from a USA based supplier (wasn't hard to find all) and SWIM'd have to say he's thoroughly enjoying this. The coke/mdma description is pretty accurate... SWIM says it feels like a speedy pill, but still good.
beer when i'm already coming down works pretty well for me, almost brings me back up a little bit... but i usually end up caving in and dropping another one anyway. i agree it usually dulls the roll a little bit if i'm still buzzed/drunk when i drop another one.