I just bought a set of U shape 50mm x 23mm clinchers with Edhub Model:FSC50CM-23-ED U with the 2:1 lacing on the rear wheel. I've got about 100 miles on them. Here are my impressions so far.
I dealt directly with Kyle who was responsive and accurate in his build and shipping time estimates. The weight came in at 1439 grams as compared to the 1450 gram estimate. Check! I ordered the UD finish and it's perfect as far as I can tell. They are true and the spoke tension appears to be even.
I used one layer of Stan's yellow rim tape. I had one hell of a time getting new Pro4s on them. It was brutal. I had to use levers and I was concerned about how hard I could crank on the rims.
Based on what I've read here about the blue pads vs. the FSE ceramic black, I ordered an additional 3 sets of blue and I've got them setup with blue. They stop great: as well as my aluminum Zipp 101s. I do get a squeal with the rear wheel when braking harder. I'll try toeing the pads in to see if that helps. Overall, the braking is great.
The Edhub rear hub sounds great. Actually, it's quite a bit like my Zipp 188 rear hub but with more pawls.
My only negative criticism of the wheels is the difficulty of getting a new tire on them. It concerned me that I might be in a world of hurt on the side of the road with a flat. Well, I've already put that to the test. I must have rolled over something sharp because I've already flatted. I was in the middle of nowhere, by myself, so I was pleasantly surprised that I was able to pull the tire back on with my bare hands. I'm not sure why, but it was probably a combination of the tire being stretched and the warm temperatures but my number one concern has been put to rest.
I'm super happy with the purchase and I want to thank this forum for helping me make my leap of faith to buying Chinese wheels.
Here are some crappy iPhone photos: