Well we tried Kemper today at school with PA and then cab, didnt tried it through fx loop.
We though that it sounded ok and fine. If someone passes by the room, he would probably think we're using an amp.
Some profiles sounded bad, some ok and some good. We didn’t profile an amp then compare, We only tried some from rig exchange and rig packs. I’d say Kemper doesn’t sound good or bad, it’s more about profiles.
We just believe there’s something “magical” about tube amps, and we still prefer to play tune amps for gigs or recording, if it’s a good one. If someone’s playing a good profile, I don’t think I would say “oh he’s definitely playing kemper, not amp”, there are differences but it’s still a guitar sound.