As Dubs said, depends on your players age/grade and stage of recruiting. My DD attended last summer (summer between 9/10th grade). We signed her up because a few of the top schools on her list (and looking at her) were attending. However, she actually verbally committed a week before the camp to her top school choice and the coach was attending the camp. She attended the camp anyway and had both positive and negative experiences.
Positive...the pressure to be seen was off. She was able to play and interact with her college coach. She met some great coaches which actually reinforced her feelings about the college and program she committed to. She also reconnected with lots of players she had met at other camps, clubs, and met new ones. She is a keeper, which is a pretty tight community of players, so it was a good camp for her to evaluate her skills against other keepers she plays against both in club (ECNL) and future college.
Negative...she got a lot of unexpected pressure from other D1 college coaches that basically told her she was making a mistake by committing to the college she did because other "big name" colleges were really interested in her. In fact, one coach was so rude, condescending and disrespectful that the coach for the interested college (an ivy league) comforted my DD and told her that as long as she followed her heart and chose the school first, she was on the right path. That negative experience actually really impacted my daughter and planted seeds of doubt about the game (not the college she chose).
Training was hard but pretty typical. The camp was very well organized, had very diverse and high level college representation (not just CA colleges, but all geographic areas of the country), and did a good job keeping player safety and health a priority (good hydration, healthy snacks, good meals, etc.).
It comes to this...if your player is in ACTIVE communication with the colleges attending this camp, and if those coaches know your player is attending, then it is a worthwhile camp. If your player is looking for a general introduction to recruiting and just wants to play and doesn't expect to 'get noticed', then it would be beneficial. However, if your player expects this camp to be 'the place' they are noticed, then you probably will be disappointed. Some kids shine, but they are the minority (based on what my DD said).
Also keep in mind that the new NCAA rules will likely impact how the camps deal with recruitment discussions. If your player is past Sophomore year (as of June 15), they can talk openly with coaches and vice versa. If they are younger, the rules prevent any discussion - including camps I believe. Of course, who's to know if the rules are followed or enforced since there are some gray areas regarding ID camps.
If your player has to choose, I'd suggest prioritizing the ID camp at their top schools. They are likely to get more individual attention and learn more about the school and program than at the EXACT camp. But if they are early in the process and just looking to play soccer with other elite players (there is a very diverse range!), and interact with college coaches, it is one of the better camp options in socal.