Just went back to skiing the 2016 Mantra's after a few days on the Bones............. OMG it's like being juiced on steroids........ it's like you've got super human strength. My legs were SO tired after skiing the new Bones that I figured I'd take it easy today and ski the Mantras...... they felt so light........ I was barely tired and wanted to ski more but had to get home before the storm hit in earnest. What a difference........ not bad, not good ..........just different (no time to go into detail right now bec I'm freaking starving and NEED FOOD!!!!!!!!)