I’ve had a pair for a few months now. I went for them because I was going through 5.10s too quickly, a lot of my rides involve hike a bike and I found walking in 5.10s separates the sole from the body, and also because of the water retention issue you mentioned.
I can’t comment on their longevity yet but they really don’t need drying out which should help and their construction suggests they wont fall apart from walking.
Performance wise they’ve been great. Grip is almost as good as 5.10 and the layer of D30 does stop them bouncing about. The grip isn’t instant but once you’re settled in they do hold well. They support well too, I wore them at an uplift day at Caerwys and was happy with them.
I was worried they might get a little sweaty but after a 7.5 hour ride in the heat on Saturday they were fine. They’re also much better for walking in as they have some toe and heel grip.
If you can get to Stif I’d recommend trying a pair on because the fit is a bit tight. I’m a bit worried it’ll be a tight squeeze getting the thicker winter lining on with a waterproof socks – which will definitely be needed as while they don’t hold any water, it definitely comes in!