I have only seen I think 1 other person use it in rec in 15 games or so. I tried it tonight for the first time and went 19-21 from 3 over 3 rec games. I had been shooting 40% using the button but gave it a try after playing around with it in my court. It's way too easy to shoot with. Hopefully no one else starts using it. If they do it'll get a major nerf soon.
I don't even look at the meter. Just push straight down and if you get even close with aiming and slightly late early or excellent with the trigger for timing it goes in. Way easier to use for running shots too. I really thought I would never use it but it's crazy how much more of a boost it gives compared to using the button.