I just took delivery last week and have been enjoying them quite a lot. They are powered by Hypex ncore amps and a Modwright Transporter. My system and listening room are in flux, so intense analysis is not possible at this time.
I had high expectations for this speaker and a suspicion that Kef went all out on this design. My expectations have been exceeded and I believe they are a steal at this price. I would feel safe to say that this speaker will out perform any similar speaker this size. My room is small (9x24) but I would add that they are not just nearfield speakers.
They are fast, transparent, and open with excellent imaging.
They are about as clear a window into my system as I've had. I was concerned that they might be bright - not the case!