"This is the best boots for mountaineering. Really."
I've been using these for a long time, I think 5 years. They are rigid and good with crampons on, nice rubber and front stiffness for climbing. With some practice you can easily do 5.9 routes. They are great as summer boots on glaciers etc. and perfect for spring/autumn boots. Also, I've used them quite a lot in the winter, say maybe down to -10C. A pair of those handy warmers are good to have, just in case. These are durable and you will enjoy these for many years.