y_ong2347242wrote a review of Salewa Pro Gaiter Performance Fit Mountaineering Boot - Men's on August 25, 2016
Familiarity: I've used it once or twice and have initial impressions
Fit: True to size
I normally wear a US 9.5 so ordered a pro gaiter in US 9.5 as well. Initial impressions: out of the box, the fit is about right with icebreaker hike lite crew socks. With my current salewa raven combos (size US 10), I wear a combo of injinji thin liners and smartwool thick ski socks, and it's a touch loose, so I suspect for the pro gaiters I might get away with the same injinji thin liners, and lighter weight smartwool socks.
The slot for the adjustment is as I feared: just the allen key hole, instead of the hole+screw that many have reported are in the newer models, so I will just have to be careful when doing the adjustment so as not to strip the hole.
Lacing is a bit troublesome; the lace lock in the middle will help tighten the bottom section when you pull straight up, and to loosen you have to tilt it to one side then the other (e.g. if you tilt it to the left, it will loose the right-side bottom lacing). If you don't tighten this lace lock or tuck it away nicely, the T-zip for the gaiter can get a bit stuck when you have to unzip it (pulling up to zip is fine, since you are also stretching the fabric a bit; but pulling/pushing down can be a bit tricky to get the zip pull over this lace lock; I can imagine my frustration at the end of the day when I'm cold, tired, and trying to get the boots off!).