Lange's reputation probably precedes this review, but I'll say it anyway: these are great boots. I imagine these are one of the best all-mountain boots on the market (or not on the market, the RX110 is now marketed as a women's boot, but appears to be pretty much the same as the old men's RX110, if you're hankering for a Lange 110). The boots are comfortable (100mm last), and easy to adjust, buckle and unbuckle. They can be a pain to get on when it's cold, so I suggest keeping them on the floor under your heater on the way up. Though the RX models have a reputation for leaking in the toe, I never experienced that issue, and never had to duct tape the toe cap. My only complaint with these boots was that the liner doesn't heat mold all that well, and has no handle on the back of the liner to pull the boot on with. The liner can be heat molded to a point, but not nearly as well as an Intuition liner. Just something to consider when fitting these boots. A good insole is also recommended, but I put an insole in all of my boots, regardless of brand or model. I feel that the 110 flex is a good compromise between balls-out performance, and comfort, and might even be ideal for park riders.