Actually, it felt a GREAT deal better when carrying it up the stairsI haven't had both a real amp and a modeler+FR at the same time in the rehearsal place (had to sell the amp to buy stuff) but I certainly haven't missed a thing since I switched. Neither had any of my bandmates. Maybe a thorough test with both playback systems would have risen certain differences, but sticking to the basics, it felt just as good.