Reaction ball is it a good buy?

Question

is a reaction ball a good thing to buy?

I am a goalkeeper.

please answer

i really would appreciate it

and please don't say that you don't know or something

Answer 1

that is one of the best investment a goal keeper can make if he wants to get better, along with going to the gym, it'll really improve your skills.

I know cause I have a friend who's a goal keeper and bought one, he used to suck, now he is much better. do that it'll get you better.