Try them or dump them, but I think you should try them.
I love them, my studio monitors have never sounded like this before.
I took Manfred's "Pure Blues" rig, using the Matchless Chieftan (incredible Profile).
I changed the Cab to Christian Vedder's Engl 412 Pro using a KSM313 and SM57.
Then I added my usual Compressor on stomp 1 and Pure Boost on stomp 2.
They sound great with a Les Paul, and just as good in a different way with a Tele.
If you don't own a Tele then don't plug a Tele into the KPA, because you'll immediately put one on your shopping list.