-Warmth for winter MTB riding (I've also gotten into the habit of using them while snowboarding if I know I'll be kneeling and waiting for people)
-I've crashed a few times with these and they haven't torn up at all (through rock gardens and roots sections)
-They don't smell too bad, haven't needed to deodorize after riding in the deserts of Utah
-Don't notice them while pedaling comfort wise, aside from heat and bulkiness
-Straps are about twice as long as necessary, I end up wrapping them all the way around my leg before attaching
-When packing these for uphills, they take up loads of room in my bag, I often have to strap them to the outside
-If you're looking for all day all mountain pads, I'd go for their "air" versions or styles because these are super hot and bulky, but not uncomfortable like other pads are (not scratchy or pokey).
Take away: Good to have for winter and park riding and snowboarding, I'd go for something else if riding in the summer or for extended periods of time when climbing is necessary (or you can just plan to pack them, but they're bulky)