I came from an Axe FX II to this, for use in the studio..
I like to set up my parameters from the front panel, with no computer connected, and the Axe FX was pretty tiring in this respect..
The Kemper is much easier to set up from the front, very simple in fact, and the sounds are of excellent quality..
I found the parameter system a bit alien, not much like anything I've used before.. A bar traversing the screen which increases or diminishes according the the amount of effect.. The descriptions of the parameters too, are unusual in general.. There's nothing wrong with this, but I must admit that personally, I prefer a simple numbers system, and classic parameter descriptions, as per most other multieffects. I feel more at home..
Everything sounds great, but I would have liked a parallel routing option included, and I must admit that after loading the USB amps bundle I got from Thomann, I found that there was simply too much choice.. It's pretty tedious trolling through all those amps to try and find one that suits- some sound quite similar.. but if you don't mind that, there's a mountain of choice.
I loved the automatic volume compensation on the compressor, and particularly on the amp gain.. That saves a lot of messing about.. A great feature.. add as much gain as you like, but the volume level stays the same..
I didn't use the amp profiler, as the available sounds are good enough anyway, so I can't comment on that.. I imagine this would be perfect for someone who wants to sample their own amp sound, and have it at their fingertips in a lightweight box.
This is a great product, but I'm going to change it for the Helix, which wasn't yet available at the time that I bought the Kemper. This is mainly because the set up from the front panel is so easy, and the routing options permit more inventive algorithms.. This is important to me.. However, I can highly recommend the Kemper, it is excellent..