These boots are awesome uphill. Should fit out of the box. I was also positively surprised about their downhill performance. Comparing to previous Backlands these (19/20 model) have higher cuff - therefore more precise when skiing.
The fit - it's personal ;) I have narrow low volume feet. The boots are stated as 98mm but they feel slightly wider. They are quite high in the instep - I'm still playing with extra inserts and heel lifts.
The liners are thin and I felt a bit coldish comparing to Intuition liners in my other boots. Also I'm wondering of the durability of these liners.
This is a high-performance lightweight touring boot that has a Ferrari-esque feel. The upper buckle has a much larger throw than similar boots (F1, TLT8). That big throw partnered with the gimmicky [yet really functional] Frictionless Pivot gives the Backland Carbon a liberating walk mode. Way better than other boots in its weight class. I like the BOA on the forefoot to articulate a precise fit while still being easy to adjust during transitions from up to down. The carbon cuff is what puts the Carbon into Backland Carbon and gives the boot a 'fake stiff' flex: the boot is stiff, but lacks a progressive flex. This is the compromise that we all take when choosing a 1100 gram boot over a heavier, more progressive flex counterpart. I'll take that compromise if it means more powder shots getting all up in my business while my bigger-booted brethren are long toasted in the parking lot. What I don't like about this boot is the stock liner. It's thin and lacks supportive stiff foam. Easily replaceable with an Intuition Cross Fit Tour for better performance at the same weight, maybe an Inutition Pro Tour if you want to squeak out a bit more downhill performance. I also think the booster strap is unnecessary but to each their own. At least it has a quality cam strap buckle on it. If you want the color scheme of a Disney villain and also want to crush vert like it's nobody's business - the Backland Carbon is what you need. I consider it a part of the UL+ category: ultralightweight but a + because it still skis really well. It's a step above race gear, but a step below touring gear. Great job Atomic.
Lightweight, skis great, walks effortlessly. All day/multi day comfort with very fast and easy transitions from walk to ski modes.