I bought these for climbing and skiing if the weather was too cold or wet for my non waterproof ski gloves. I don't love them for skiing (so far) because it has not been cold enough and I prefer finger dexterity for manipulating my poles, opening pit zips, etc.

They are great above 10,000 ft or on winter ascents--my hands perspire, though, and things get a little clammy if it's not cold enough outside. They are very warm and if I need the tough outer mitt (for handling an ice axe for example) but not as much warmth, I sub-in a lightweight fleece Oslo lilner from REI. Really love these. Might get an OR Flurry mitt to use as a liner for when I need no dexterity but max warmth (my wife and kids love their OR Flurry gloves).

Ecstatic they are making this Mitt again!!
I have a mild-moderate case of Raynaud's Syndrome-(a vasospastic disorder that is brought on by cold temperatures). This fact makes performing virtually any activity outside in the Fall/Winter/Early Spring, very uncomfortable to very painful without gloves or mitts.
It is so bad, it has made me consider retiring from skiing/climbing altogether.
I've owned 3 pair of these Mod Mitts and wore through my second pair about 3 years ago. (cat took out my front bike wheel, hands saved, mits sacrificed :) These mitts are the only pair of gloves that have been able to keep my hands warm while BC or Lift skiing, climbing, hiking, biking snow removal etc. OR apparently DQ'd these a couple of years ago, and the OR Alti mits are too bulky for anything but climbing, IMHO.
I've had these new mitts just a short time, but believe they will be every bit as great as previous versions, and probably better. The new mitt liner, although it is a glove rather than a mitt liner as previous, has a pocket for a hand warrner, which I still need to wear with any mitt or glove. The fact that it is on the inside and back of the hand, makes it actually useful and keeps the warmer from flayling around inside the glove.
Until I get step-in Tele gear, I am stuck reaching down to get into my bindings. While I often cannot do this with my mitts on, the liner is warm enough to do this with.
Skiing/Hiking/climbing in the NW wet conditions makes the taped
Gore-tex shell a must, and my hands definitely stay dry in these mitts. Bombproof product, Highly recommend it, even for someone with cold hand issues.

I use the Modular Mitts mostly for lift service on most days and bc skiing. I always carry them in my pack for when my hands are freezing and I need to warm them up. I love the seal around the wrist/jacket cuff which locks out snow and cinches tight. The liner is comfortable and toasty while the shell traps in heat and is easy to slide off and on. A grerat pair of mitts that work and are rugged against rock and bark.