I don't use KDE but I haven't had any problems with Mint so far. A lot of people have been talking about how great ubuntu is and I considered going back to it but I have mint all set up just the way I like it and am hesitant to go through all of that again unless necessary. My experimental computer has now become my Mint Computer and I wish I had another one that I could use for other distros, but if I had one I wouldn't have room for it.
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The last time I kept an open mind,
my brain fell out and the dog grabbed it.
Now it's full of dirt, toothmarks, and dog slobber.
No more open minds or dogs for me.