I just helped friends buy a home on Bella Vista Way... they had visited nearly every area neighborhood for 2 months and saw countless homes. When they settled on the home on Bella Vista Way the first neighbor they met was incredibly friendly, and raved about the local school. But I agree with Sally, it's on the foggier side as far as neighborhoods go. My Buyer friend grew up in the Excelsior and was quite familiar with the neighborhood's fog, and it's probably one of the reasons the home they found was a better home for the money then much of what they found elsewhere.
Whether or not the neighborhood itself is right for you, I strongly suggest several walking or slow driving visits... on the weekend, in the evening, week days, etc. Visit the stores along Portola, have your kids play in the playground, and talk to whoever you can. You'll know after just a few visits if it's right for you. Both my Buyer and their new neighbor have children, and are all quite excited about the neighborhood.
To search for area homes, visit the "Search for Homes" link on my site below.