Subject to getting a TT, I'll be trying it out at the LCW to see how it does, and then make a decision.
Noted about some of the descents being technical, the one into Narbeth before the climb into town was particularly unpleasant (if I remember correctly), bu quite a few of the ascents and descents were fairly striaght forward, so it's still a tough call.
Having volunteered in 2012, there were a lot more TT bikes on the course than in 2011, I think the feedback generally was that TT bikes were suitable, although 2011 did have stronger winds, but that really had a biger impact on wheel choice than bike choice.