Received mine from the grove. I went 10 in both my racers. I think a 9.5 would have been better though. I might reorder the Crimson in. 9.5 and then try and find an Oreo to swap if 9.5 works better. Especially with thin no show socks
picked up the multis in store yesterday just to be safe, although I might return them. They also had the oreos which looked great. Total Orange and hyper grape also look very nice.
I don't have any 4.0 flyknits sorry. only other frees I have are the 2's and a two pairs of ID's from a few years back. I believe one has a 3.0 and the other a 5.0. The only ones I've actually ran in were the 3.0s. The rest were more or less casual shoes.
It was pretty nasty out all day today so I just put them on to size check. They fit pretty TTS for my in my typical Nike 10, but a 9.5 would probably have worked too, just snug. The sole is a typical free so nothing that should surprise you there, just not much cushioning compared to a lunar...