The Vforce3 reeds made a slight difference with my bike waking up on the bottom end, but the biggest advantage has been the life of the reeds. Whenever I bought the system I went ahead and bought replacement reed petals just to have as backup in case I ever needed them switched out on a ride. It has been two and a half years and I'm still on the original reeds. They have not warped, cracked, split, or chipped at all. They still look exactly as they did the day that I bought them. They are a little easier to change out because there is not an outer cage that you have to unscrew to lift the reeds off of the reed cage, you just slide the whole assembly out of a collar and then lift the reeds off. The only down side to the whole system is that the gaskets are a little different from the stock gaskets, so you have to order those gaskets specifically and they're both a little difficult to find and more expensive. What I have done is just went to autozone and bought a sheet of gasket material and cut them out myself. I actually think the material is better quality and for just a few bucks I have a large sheet that I could use to make 16 of those gaskets. All for a total cost of about $4.
So basically if you're looking to gain huge differences in power, you will be slightly disappointed. Again, it will probably clean up your bottom a little and give you better response at low rpm's, but no huge gains anywhere else. Overall, I'm happy with my system but if I had to go back and do it again I would have probably just stayed with the stock cage purely for the cost to performance value.