Fuel cost me about 15 bucks a gallon and the cost is effecting how often I fly these days. I burn almost a gallon on any day I fly. With gas I use about 1/2 gallon or so and it only costs me about 3 bucks a jug. I would only be flying gas if fuel was costing me any more. I'm on a fixed income, prices of things effect me, I had to give up shooting due to cost.
ES, your not going to find any consumer report on this subject, there are only two four stroke gas engines I know of and I think the one has been dropped some time ago. As I recall it was a FUJI?? If you go to the gas engine forum you will be able to get some better information. The Saito isn't an engine you see a lot of at the field, I still haven't seen anyone with one.
I run four stroke glows, only have a couple of two strokes I'm using these days. There is no real benefits other then a bigger prop and better fuel mileage and you really don't notice that little benefit at all. Sound?? Four strokes sound cooler.
Go see what is going on in the gas forum and what people are saying about the Saito.