i have one on my 01 srx, been running it for the past two seasons, with only one prblem. i encountered, fuel getting into the vent lines when side hilling or rough riding, causing low end and starting when warm problems. i rerouted the vent hoses over the carbs and the problem was gone. the instructions say to jet to -20*f and lean down the mixture with the tempaflow adjustment screw. this will work as an elevation compensator too, the directions say 1/8 turn per 2000' rise in altitude. the directions also say it is effective for up to 6-8000 feet of elevation change. just make sure to richen it back up while descending. i also lean out the screw when riding in temps over 40*f. the big things i noticed were, the great fuel economy, (close to 20mpgs on real cold days) always crisp throttle response, and very consistant performance day in and day out. as long as you dont have gobs of mods to your sled so you really have no idea where you need to be jetted it is a great performance add on. the best thing if you have alot of mods is to invest in an egt set up and check that along with piston wash and plug colors, just because it says 1200*f on the guage doesnt mean it isnt hotter in the motor. you need to double and tripple check the outcome to know where your egts are at along with proper wash and plug color. better safe than burnt down. my .02 ski