We actually bought a Hot Spring spa elsewhere, but were more or less dumped out in the cold in terms of follow-up service of any kind.  The San Mateo guys took us under their wing, and even came out to the house to give us a refresher on how to do our chemical treatments correctly (since the original place had given us completely wrong information).  We are very impressed, and will be customers for a very long time.
, Napa - 5 / 5