This was my kid's first experience doing this out West. A few observations:
There many talented players in this age group. Congrats to those who made the cut! They said that there are roughly 9,000 players in the age group in SoCal, so it's an accomplishment to be selected at all.
There is no "system" to play within at these ODP sessions. The coaches pretty much roll out the ball and say "go play." There really isn't coaching or training at all, so don't send your kids for the training or coaching.
The format favors aggressive, selfish players. Players willing to push their way through the scrum and knock girls down. I don't mean this in a disrespectful way. I actually respect the drive and passion I saw. It seemed like kids were trying to get noticed by taking on other players on and going on long individual dribbling runs. By the 2nd day, my kid was rolling her eyes every time she collected a ball, made a pass and then moved into space, only to have the recipient take off down the field into traffic and try to dribble 4-5 players. I encouraged her to be more aggressive and go for it herself, but she thought is was ridiculous. Ultimately she didn't make the cut, so you could argue that she didn't do the right thing, but it's her journey not mine so what can you do?
I was surprised that Cal South didn't make it feel more special. There's very little done in the way of banners or signage or hoopla. There's a lot more of a special field at National Cup. This year, we didn't even get matching uniforms. I saw a picture of the 2007s and they had matching shirts and shorts, while we ended up with a white t-shirt. It may seem trivial, but I would have liked to see more recognition overall and value from the session. Show the girls a bit more love.
My kid really enjoyed meeting and getting to know players that she competed against this year. She thought everyone was great.
Overall, I would send her again if given the opportunity. It's great to have her experience a highly "alpha-oriented" training and tryout environment. If she's going to be successful, she's going to need to learn how to deal with this type of environment, whether in high school, on a college pitch, inside a company, etc.