Just completing my 4th ski season on my basic model Stryker. This season because of bad snow and a new grandson, I only got 80 days in. That makes a total of 305 ski days on my new knee. Still no real problems. I worry a little more when I have a sore knee but it always goes away you can still stress soft tissue even if the joint is fine. Ski the whole mountain but don't do bumps agressively and only do them if there's a reason. Worst thing seems to be spring skiing. Frozen ruts in the morning and slush throwing you skis back and forth takes its toll. Just remember "I think I can, I think I can".