The K2 Spyne 110 is a great all-mountain boot. It blends power, performance, and comfort just about as good as any other boot we’ve tested. The K2 Spyne 110 also comes in a 97, 100, and 102mm last that will fit a wide variety of foot shapes and skiers. I’m on the wide end of the spectrum, but can tell you that the boot construction is identical between the 97 and 102, except for the last. Now I can’t even begin to squeeze my foot into the 97, but everything about the 102 seems like it would perform just as well as the 97. The K2 Spyne 110 has a flex rating of 110 which feels to be moderately stiff. The K2 Spyne 100 is designed with K2 PowerFuse SpYne technology that allows the flex to be smooth and natural while still providing a great amount of rebound and energy. At 150 lbs the 110 flex is still powerful enough for me, but heavier skiers will probably benefit more from the stiffer flex of the Spyne 130. K2 also offers the Spyne in a medium 90 flex option for lighter or less aggressive skiers. The cuff is slightly lower than that of the Rossignol Alias Sensor 120, or Salomon X Pro 130, so it fits those shorter guys a bit better. I feel that the taller cuff gives me a bit better power, but those guys who prefer shorter cuffs will like the K2 Spyne 110. The stance feels slightly forward of neutral, but it doesn’t feel too far forward. I like a neutral stance for almost all terrain and conditions. It just feels more comfortable, and natural. I also find that I can play around a bit more, and it’s far less exhausting. Other may like a more forward stance, especially those racers or carvers. I’ve really become a fan of these mid to high volume boots that still offer some great power and energy. The K2 Spyne 110 is a great blend of power, energy, and comfort that will have you ripping around all over the mountain.