Ethan Z.wrote a review of La Sportiva G2 SM Mountaineering Boot on June 23, 2019
Familiarity: I've put it through the wringer
Fit: True to size
Have worn these for a week of ice climbing (CO) and two weeks of AK mountain climbing (Mt Drum). Very comfortable and warm. Like all boots and shoes these will either fit your feet or they won't and how they feel will depend on the individual. They were the only footwear I had for two weeks in AK and were just great the whole time, no pinch points, no hot spots, certainly no blisters. I used thin smart wool socks with a liner. The Boa system is just awesome, makes adjusting on the fly so easy and no fussing with laces sitting in a tent pulling them on when it is snowing...As others have noted they are not waterproof all the way up (basically from ankle up) and this is a disadvantage. The advantage is that they are much easier to get on and off than a boot with a zipper (Phantom 6000) or with laces (Spantik). If you are planning lots of (more than 3-4" deep) stream/river fording this will be a problem. If you are planning on staying on snow/ice it won't matter.