When I was looking, the mello roos fees really turned me off to Del Mar. In some places it was almost 1.9% tax. There are also no stores nearby. The closest was in 4S. In addition, I found the location far from the freeways.
Having said that, it seems like a decent place for kids since the neighborhood is new and lost of young families. If your work is in Del Mar, or Sorrento Valley, the location is probably better than in RB or Carmel Mountain Ranch. I also did look on the map and there is a town center planned, but not sure when that is coming.