I have had a couple of kids play in the Connie Mack Leagues in Southern California over the last four years.
The Southern California Connie Mack leagues are extremely competitive. You will not see a weak team. There are some teams absolutely loaded with talent. The level of competition in Connie Mack is above any of the high school leagues in Southern California which are if not the best in the country, pretty close.
You will always be able to follow many of the kids as they have success in college and pro ball. It is very enjoyable to watch these games. The only problem I have is not having rosters of the teams to really know who I'm watching all the time. It never fails during a game, you have a kid really play well and you wonder who the kid is and where he from and where is he going.
You see the programs like Trombly Baseball, SGV Aresenal, Playa Vista Orioles, and so on. You get to see kids from all over Southern California compete at a very, very high level.
A great experience to watch...a better one for the kids to play in.