These have managed to replace the Gemfan 51433 as my favorite prop. Reason being I was able to tune way more out of them them than the Gemfans. With my new build I couldn't even find the point where the Gyro would freak out or the motors would get hot. I stopped at a d-term multiplier of 2.0 which they were still pushing just fine, and just notched it down to 1.8, was able to push the PI gain that high too. The only thing I can assume is they are quite low vibration. With the tune I have on it now my quad feels like its on a rail and the propwash handling is great, some may not like that if you're into a more slippery feel, but you can fly these that way closer to betaflight defaults too.

They have a precise linear throttle response, they fly nice, they have minimal propwash. I flew the same tune as my 51433s and they fly fine on it. I think I still like the 51433 better so these gets 4 stars. I get a little less flight time per pack but likely because I'm on the throttle more than with the 433's