Any problems with opti 2 2cycle oil gas additive?

opti 2 is a all ratio oil to gas additive that treats all ratio 2 cycle engines. I have have been using it for approx 10 yrs. and have had not only excellent results but haven't had to carry around 4 different gas oil mixture cans 1 to 16, 1 to 32, 1to 40, 1to 50. I'd like any input you might like to offer.