I've been limping my builder-grade air conditioner a couple summers now, and once again this year, it didn't have any refrigerant at the start of the season. Called up Valley. One of Bryan's technicians was there promptly, gave me a charge to get me going, and then Brian came to do the leak detection. Found the leak right away, versus Swann, who claimed they couldn't find a leak last year, and that my system must have been low on coolant at the install.
Bryan gave me a realistic appraisal and several options for repair or replacement. I ended up gritting my teeth and having the whole furnace and AC replaced. They showed up when they said they would, completed a challenging job in a day, and now I don't have massive air leaks in my mechanicals room and the house seems a lot more level in terms of cooling.
Nothing but great things to say, and if you find yourself in need of HVAC services in the Northern Colorado area, Valley gets my full endorsement.