I did it for a short while. Also attempted to try out MMA, took some boxing and karate as a kid. The problem with all of that is that it's very, very, VERY time-and-energy inefficient when it comes to actually increasing applicable hand-to-hand combat capacity.
You also have to be a normie and socialize/have friends to be able to spar more than 15min per session or whatever. They also didn't separate new people from advanced practitioners and had everyone do the same exercises (LMAO). This is sometimes called a McDojo
.
It's a lot about "having fun with friends" and playing around rather than making anyone better at self-defence for the most part. It's probably the most enjoyable form of cardio, though.
They need more sparring, more organization (easier for non-normies to spar), less warm-up, less push-ups and squats or whatever (strength and agility training in your own time) otherwise it's not worth it imo. Just buy a baseball bat, knife or gun, LOL.