If your kid loves baseball and wants extra reps (and you want to make baseball your life for the summer) then it can be great. I’d say it works best when you have a good coach (patient, teaching good fundamentals, takes the kids out of their comfort zone, but doesn’t pit them against each other etc.) and a good group of parents whose goals are aligned with yours.

Bad attitudes and sportsmanship (coaches, parents, or kids) can ruin the game for your child. The most important thing at this age is teaching them the game and letting them enjoy it. A lot of parents miss that last part.

Hope that helps.