Here are my specs: male 5'10'' 170lbs. expert skier, Wasatch Mts. Utah, skiing the 188 centemeter S7 with binding set 1 1/2 cemtemeters ahead of standard mount. The 188 fits me perfect. My every day ski is the Line prophet 100 179 centemeter in length. Binding set at factory recomended mounting point. Ok....so I thought to myself "what's all the hype with the rockered ski stuff. Can it really make that much differece?" The truth...yeh it's so fun...it almost feels illegal. The S7's are really a wonderful ski...quick, nimble, lite, great float, makes you want to charge the mountain even more. Greatly simplfies the crud and groomers and bumps are no problem. Best used in 3-4 inches or more of powder. Why they work...the rockered tips and tails allow the ski to release itself from under the snow much more easily minimizing the natural effect of deep snow to trap the ski below the surface. The over all effect is a much more playful ski experience even for advaced and expert skiers and even more difficut snow conditions like heavy deep snow, become a much easier ski. Effective ski snow contact on groomers for a 188 is like skiing a traditional 165 so don't be afraid to go longer than what your use to. You need the extra length with this type of ski. Bottom line...the S7 is a truely fun ski from top to bottom and the traditional camber underfoot makes getting back on the groomers to the lift so much the better. Enjoy!