I bought a pair, wore them a few times, and liked the fit (and price) so bought another. They’re my only jeans now- I like the practicality- the finish sheds not only water, but most dirt seems to brush off as well. Great for playing with the kids, and I know it sounds banal, but I can put them on and no longer have to worry about what I’m doing, whether it’s going to rain, how long am I going to be running around in wet trousers, should I take overtrousers etc.
Skiing – if you’re competent and don’t spend half your day headfirst in drifts, or it’s snowing and the jeans are going to get a coating going up the chair, you should be fine- the cold will penetrate quite easily if they’re covered in snow, but then again when I was a kid we’d quite happily ski in jeans of the non-waterproof variety- it was fashionable for a while.
I reckon they’re ideal mucking around in jeans, and may be fine for bouldering, but at the end of the day they’re nothing more than jeans that are waterproof- they won’t really preotect you from the cold/exposure etc.