I've got last year's Ultegra/Dura-Ace version which I paid £1400 for back then and it's excellent. Fast, light, surprisingly comfortable (better than my Kinesis Tk winter bike) and has done 2000km over that last year.
Wheels (the Planet-X B) are still straight and true, and bearings still seem to be good. Only annoyance with them is the stupidly noisy freehub clicks. So I'll be replacing them with something a little more traditional when funds permit. Mine has a slightly better spec than the current one though, carbon seatpost, FSA SLK brakes, FSA carbon cranks etc, but that one isn't a shabby spec at all. Their saddles are crap, mind, I stuck a Specialized Alias on (in white to match, natch).
Oh, and I've got the XL, and it doesn't flex. At all. Even with my 16st out of the saddle up a steep hill.
Superb bike for the money, and highly recommended. Looking forward to going out on it tomorrow now 🙂