If you're fixated on Union, why don't you look at the Legacy too? They might be a better option for you as far as response and comfort. I think the Rosa is more of a beginner binding which might have limitations as you keep progressing. The legacy might be a bit more pricey, but I think it's a better binding than the other two and more versatile. The only thing is it has a mini disk and not a traditional disk which gives you more board feel laterally. Some people don't like that surfy feel. They like that dead spot under your foot. It works good on all mountain boards, park boards and GREAT for powder boards because of that surfy feel.