I have one, which has been a bit relegated to winter/wet weather bike and like vickster, I bought it for £500 with Rival 22 and Camp Khamsin wheels, which was a bit of a no brainer.
I still like it a lot, regularly using it, despite expecting it to gather a bit of dust when the KTM arrived. It's done about 1500 miles and nothing has gone wrong or been replaced, save for changing the tyres to Duranos to fend off winter roads.
Compared to the KTM, it's a bit lethargic to accelerate, but one up to speed it'll stay there all day. It's surprisingly smooth and the handling is pretty stable, whilst being nimble enough. It's got just enough room for Drud Road Racer MkII mudguards with 25mm rubber, but it would have been nice to have mudguard eyelets to widen out the choice.
The Rival 22 is brilliant (and I have Di2 to compare it too) which sort of begs the question - A lot of it's qualities come down to which build you spec'd?
Russell