I've had these boots for over 4 years now and they have performed very well as an all around mountaineering boot. The Pros are... Very very durable, stick to rocks like a mountain goats hoof, work well with crampons, they keep your feet warm in freezing temperatures (with a Gobi Liner, thick Cold Weather Sock, and a Vapor Barrier Sock if its really cold) but can also be worn in warmer temps without over heating your feet, and they keep your feet dry in wet conditions. The Cons are... 10 to 20 hour break in period, heavy boot weight decreases endurance, and my biggest gripe about this boot is the poor ankle support. I'm not able to get these boots tight around my ankles and my lower leg. I'm able to fit 2 to 3 fingers in between my ankle and the boot and that has always bugged me. I'm 6'4" and 185 Ibs so I have pretty skinny legs so this little problem may not be as big as a deal for the average person. Overall, a very good all purpose mountaineering boot. Just be sure you like the fit. I'm going to try the La Sportiva Lhoste GTX for my next boot. It looks like it has a little more upper ankle support.