I have just purchased and installed them. they are very light and the bike definitely feels more agile in acceleration. They do flex a little laterally and compared to my Specialized Axis classics, I lost 1.6 lbs of weight. They do roll forever. Would have liked more lateral stiffness but when you are up to speed, I do not notice it. It is only when I am riding slaloms at a lower speed that I notice they flex.

I do like them. If it matters, I am 200 lbs and so far they are great.

If you are concerned with the flexing, the Corsa lites would be better or so I am told.

I would buy these again.

Do not know your wheels to say if the change is worth it or not. Having an extra set of wheels, to me, is always worth it if for nothing other than backup or to set up a trainer tire or for bad weather.