Installed this on my 90hp Evinrude yesterday using the no-drill method. Took the boat out for a test and noticed several improvements: Better handling at low speed (less zig-zagging), gets on plane faster with less stern dig, maintains plane at lower speed. In all situations the improvement was not huge, but was noticeable. I consider it worth the money. The no-drill installation seems to be holding up, but that was only after one test ride, so time will tell. The reason I didn't give it 5 stars is that the installation bolts are just barely long enough to reach through the foil, cavitation plate and no-drill washers. Would it have killed the manufacturer to include bolts that are a quarter to half inch longer, or maybe include 4 extra bolts that are a little longer. Also, the lock nuts are supposed to be 7/16 but I tried several 7/16 wrenches and sockets, and all were just slightly too small to fit. I ended up using a 12mm socket - wasn't perfect, but was the closest fit I could find. For $100 you would think the manufacturer would pay a little more attention to detail. However, the product seems to be working well and I would purchase it again.Update: After several more trips and tests I've found that if you trim the motor all the way down before hitting the gas then it planes almost immediately with barely any dig. You just have to remember to level the trim back up after planing, otherwise there is a lot of drag (understandably).
Rating: [4 of 5 Stars!]