ehe2439977wrote a review of AX-Lightness Ultra 28C Extralite Hub Clincher Wheelset on June 21, 2015
Familiarity: I've put it through the wringer
Pro- These are as light as advertised, about the same as Zipp 202s in crosswind, holding up very well to rough roads, seems to give a slightly wider tire profile than 202s
Con- braking is marginal/fair despite trying several different pads. Have not ridden in rain but high gloss braking surface does not make me optimistic of a good result. Ungodly difficult to mount tires Pre-stretched Continental 4000s I put on by hand onto 202s and 6 flatted tubes and 3 broken levers still have not gotten onto these Although I originally only flatted3 tubes putting on first tire. Specialized cotton tires were impossible for me or my LBS to mount. First, the rims probably have a very very slightly larger diameter than the 202's. Second, whereas most rims have a large, deep bed between the walls of the rim, these have only a very narrow grove and then high "shoulders" underneath the rim walls. This means that the bead of only one side of the tire can fit in the grove, so the other bead is higher, taking away any slack to the tire bead on the opposing side of the wheel, causing the extreme mounting difficulty.
Overall an excellent special day wheel set if you can afford it but do not flat since it is extremely unlikely you will be able to change the tube without shop tools.
I also incurred significant tire rubbing on left chainstay (actaully wore a little bit of the carbon chainstay away) that did not occur with the 202's so these are clearly not as laterally stiff, although I did not notice it when I was rising.