I was there Saturday with my toddler. The park is gated off and closed (fob key doesn't work either yet), but we sneaked in there for an hour to play. Best tot play area out of the 3 parks. Playground is very nice with open space and pool next to it. It has a great city view too~ I will be visiting frequently once it opens.
I think they started building the model home for the Alta Vista Toll Brothers rights behind this park.