I got the Kemper last week - a nice black lunchbox from Thomann, it came preloaded with latest version firmware and rigs, and also got an email from Thomann with a few more profiles to boot!
I have been a guitar player for almost 40 yrs and used many types of amp and guitars etc.I played professionally for a number of years as well as studio work and songwriting. I looked into the Kemper as my main amp is a single channel low wattage valve amp ( a cornford carrera) and I was getting a little frustrated by its limitation of sounds.
So my thoughts on the Kemper so far is that it is an outstanding bit of kit. There is a bit of a learning curve but not too bad IMO- the ease that I can reproduce certain sounds is really what I find most impressive...also I have learned quite a bit about different types of amp that I never even knew existed! I have been listening to and tweaking the profiles and rigs so haven't even got to do any profiling yet...but all in good time.
I am putting the kemper into a mixer then out to a pair of behringer truth monitors.it sounds great but I may look into other options as well.I really like the way the kemper takes a stomp in the front end too!
The only limitations are that it is still a product which has areas that are not yet fully developed, but for my purposes this is ok-I am able to work with the kemper fine as it is. Fantastic sound machine.