I have one as a back up. the blade broke with what I felt was not much force.. Like zombie academey replaced it so I still have the paddle and the old aluminum shaft got repurposed into a 360 light.
However the blades are flimsy IMO and even if you are carefull with them you are going to use a lot more energy to cover the same amount of distance. There is just way to much flex in the blade on your stroke.
I've had mine for 3 years and use it to push off and do all kinds of other stupid stuff with and my blades havent broke yet. I don't doubt that a much more expnisive paddle is better. But for the money I dont think it can be beat. And im not a light guy either at 6'3" 240lbs. Im honestly surprised I havent broken a blade yet. I guess I got one of the good ones! lol