My thoughts here.
I have the ripper 110 Jeffery and can confirm the edge hold is better than the usual rocker so I do not think its a gimmick. However On3ps are not torsionally stiff this is what lends them to be so good in shitty snow. They will absorb and are easy as hell to push around. However, that lack of stiffness makes them suffer a bit when things are firm firm. Are they impossible to ski on ice? No. Am I laying trenches? No. Can better skiers do it? Probably. Are they predictable? Absolutely.
Coming from Golf and getting in to skiing in my mid 20s, I quickly realized that skis are like putters. Putters lend themselves to different stroke arcs (different stokes for different folks). They also use different metals and inserts to produce different feel of the face (Firm/Soft). Some putters are better on poana and bent grass where others feel better on Bermuda. Just like some skis feel better with PNW snowpack and others work better in the firmer east coast. There is no one putter or brand that fits everyone. Same with skis.
Point being ON3P won't work for EVERYONE. But they work damn well for those who jive with them. Figure out what you want out of your ski then purchase.
I am a Titleist/On3p/HL whore and I'm ok with it.
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