i've used delta v-force reeds on two different yamaha's. a '95 600 twin vmax and a '99 triple 700. the third set is under the bed waiting for the 04 mtn viper to come off warranty. i'm in the spend the money camp for the following reasons. improved throttle response, a little more horsepower from motors that could stand a lot more,(especially midrange/topend) and fuel mileage improvement. don't know about where you ride, but out here in the west gas stations are few and far between not to mention ever spiraling gas prices. if you're looking for the biggest bang for the buck then yes there are other ways to spend your money, but if its part of an ongoing improvement project to your sled, then i wouldn't leave them out of the picture.