Ive also been looking at these, i have used some similar before and have had good results. for what its worth i think i might give these ago. if you are wanting to cut ply then i would suggest you use a straight fluted cutter, there are a few on the market.. but having used a fair few i have found that the geometry on the cheaper ones like the ryobi and silverline to be really poor and this is shown with the cutting, they seem to resonate more so than cut, now swap to a trend, freud or titman and you will have alot better results.. thats if your cutting woods anyway.