I've run this dado set through just about every material there is and it  produces sharp sidewalls and flat bottoms every time. The blades run true  and with about 150 lineal feet of material run through, the teeth are still  sharp. Just remember to clean the resin or glue residue from the cavity  behind each tooth as it builds up easily and starts to burn the work piece.  I have a Jet contractor's saw with the 1.5 hp motor. The dado insert you  can order from Jet will only accomodate a 6" dado set. You will have  to use a zero clearance insert to make your own, otherwise you can use the  metal one from Jet and limit the depth of cut to about 1 1/4". Kind of  defeats the purpose of the 8" blade. Also these blades are heavy and  if you use the entire stack, the 1.5 hp motor does not have enough power to  cut a dado to more than 3/4". You will have to make more than one pass  to cut one deeper effectively.