I recieved my meg-mo blades this past Friday and put them on for this weeks servicing. Gravely PM260. 3 sets one for each spindle. I notice a slight lag when I engage the blades (but I engage at 3/4 throttle) and a clunk noise as the blades straighten out. The grass is rather thin right now, no rain in 2 weeks and plenty of sun. On the few lawns that are lush, the grass is coming out in much finer particles then with my hi lift or standard blades. There is much less drag then with when I ran doubles and the particles are finer as well. Cut in morning dew on a lush yard. No noticable accumulation under the deck. Cut on a yard that had just been irrigated. No noticable accumulation under the deck. On my toro 21" I bought a set as well. runs like it has more power compared to the one that I did not mount the meg-mo on. I should say in lush grass it takes a bit more to bog. The grass is finer particles then the standard mulch blade. On both mowers I was able to get double the interval before needing to resharpen, but it does take a bit longer to sharpen. I use a bench vise and an angle grinder with an overlap sandpaper disk, so getting the blades clamped down while on the wheel is a little more time consuming. My opinion so far, great investment.