My third, and final, visit to the Cornerstone.  Let me say this - the food is fine.  In fact really good.  But every occasion to eat there has been marred by poor to horrible service.  I can't decide if the staff is always overwhelmed due to short staffing, or just simply inefficient.   During brunch, a fairly busy time around noon on a Sunday, we saw our waitress once before ordering, and then not again until our food was delivered.  I had to flag down other members of the wait staff to get refills on our coffees and drinks.  Each time a refill was provided, the waitress took only one glass or mug away and brought back to the table then took the next.  If the waitress wasn't such a rarely spotted experience, this would have been OK, however this just caused more waiting for us.  Sadly, good food cannot save a restaurant that can't provide the service to support such great efforts in the kitchen.