For my toaster, I used and then sold an MC8. It was easy to program and was a solid piece of gear. It had drawbacks with regard to performance mode. It was nightmare compared to the relative ease of using the remote that I purchased subsequently. The pages and banks also don't align well with the Kemper.
For live use, I did not get along with the MC8 switching action - double tap, release and long press. Yes, it all worked as intended, but resulted in occasional unwanted switching. Bad news in real time, but YMMV.
On a slight tangent, I am flabberghasted that Kemper did not design remote connectivity to the player. It could have been seemless.