Well - Finally got the first chance to use them. When I first took them out of the package and tried them on, they seemed tight around the mid-foot, so I looked on like to see if they had something else I’d want to trade for, they didn’t, so I tried 'em on again w/thinner socks (And I wasn’t home sick… Better mood) and they seemed OK.
They are 7mm “stretchy” w/5mm soles (not sure if the soles are stretch, as, on the HyperFlex website, they indicate they use some “old” neo) I hope are not stretchy, as you may recall my whining rants about the state of gloves and booties these days… lasting about 2-3 months worth of heavy use. I could feel the rocks more than I like, and I didn’t notice any difference in feeling my board, but then again, from what I understand of others experiences, I don’t have very sensitive feet anyway.
In the water they felt, after a while, a little baggy on the top of the foot, ok, well, my right/back foot - not good, as my hypothesis is more water = less warmth (But my feet didn’t get cold in a 2 hour session - water is @ 47 here.) but the good news is they stayed tight around the foot and toes, w/out feeling too tight.
I didn’t have any problems with them while riding.
I’ll give an update after a couple of months of use.