I got these for an upgrade from the 450's and it has made a significant improvement in flight time and power. I can now fly faster and for almost twice as long. I am still learning how to fly FPV so longer flight time means more experience per flight, speeding up my skill greatly. Now I can make multiple laps around my entire house and still have enough battery to come back to my chair to replace it with a new battery. I get about 35 plus mins of flight time if it is on a bad day! Definitely recommend these for upgrading your drone.
More flight one to enjoy, but holy different physic of flight.