NickMwrote a review of Scarpa Phantom Tech Mountaineering Boot on November 18, 2019
Familiarity: I returned this product before using it
Fit: True to size
I tried them on for a bit and returned. Here are my thoughts:
I have slightly wider and taller-at-the-instep feet than the average Joe, but nothing that special. I can wear most common ski boots, climbing shoes/boots, etc. without issue. The fit on these was odd. In a 42, my typical size, they were too snug width and height wise mid-foot (the gaiter zipper could barely slide past), but too long beyond the toes. This is not something I typically experience, but my history with ice boots is limited to Sportiva nepals and silver bullets.
I ended up buying the 2019 phantom techs for the much better fit on me. The 2020 model felt like a whole different bird, not an update. The 2020 gaiter zip is clearly simpler and better, and the sole felt stiffer. If these fit well, they would likely climb very precisely. The sole rocker is cool, but due to my weird fit, it's hard to say if walking comfort has improved from 2019. I could feel, barely, the 4oz weight difference. No idea whether they're warmer than 2019...with the weirdly snug fit on me, they surely wouldn't be.