What a horrific disaster these people are.
They did the original install on my AC according to my builder. So when my AC unit started leaking I called them since my house was less than five years old I figured they might know a bit or give me a deal since the AC went bad after less than five years. Boy was I wrong.
The guy they sent over was not unpleasant, but for some reason when talking to his back office over the phone he couldn't give me an estimate. When I repeatedly requested some sort of price the repair guy said somewhere between 1800-3200 bucks he "guessed." He promised the office would call me in the morning. Also on the way out the repair guy kicked my three year old in his face! I called them that next afternoon wanting to know how much it would really cost and why they hadn't called me. They assured me they would call me the very next day. They didn't of course.
After I called them five times on five consecutive days they finally gave me an estimate of $3200 bucks. I got a second opinion, you know what that (highly reputable/highly rated on yelp) second opinion did? They fixed poorly installed parts (poorly installed by Sierra) completely negating the need for any part replacement. And apparently Sierra flat out lied when they said I needed a new coil: about $2000 in work.
Sierra told me $THIRTY TWO HUNDRED DOLLARS TO FIX THEIR TERRIBLE INSTALL.
and then a friendly, more reputable place did it in EIGHTY FIVE DOLLARS. EIGHT FIVE.
SIERRA CHARGED ME SEVENTY-FIVE JUST TO SHOW UP!
(Okay they didn't kick my three year old, but I bet they wanted to.)