Just keep in mind though the reverse is weak.
I run one similar on Shelley Foss 36" and reverse is less than half of what forward is.
For the money ,it works well.
Have access to an Ammeter? you could test the unit for current draw..
the best forward/reverse ESC I have experienced so far is the Mtroniks Viper Marine ,a 15amp can be had for about the same price as the 50amp unit..So it would pay some dividend to get your mits on an ammeter ..Or ask a friend for a hand.