William B.wrote a review of La Sportiva G5 Mountaineering Boot on February 1, 2018
Familiarity: I've used it several times
Fit: True to size
The heel lock down for climbing and release for belaying is amazing. Huge upgrade over batura 2.0 in that regard. But like others say, if you are not dealing with frozen terrain, they leak. But I'm a roadside cragger in cold temps so they are the best ice boots I've used. Anything involving slush, stream crossing they are a no-go.