I read the other great, 5-star Yelp reviews and called Tim. Made an appointment for the next day. He said he'd call 20-30 minutes before he'd arrive and he did, within the one-hour timeframe he'd scheduled.
Tim has a professional demeanor and his expertise was apparent. I appreciated his meticulously checking the valves on the A/C compressor for leaks. He added a pound of refrigerant, tested and re-tested the air temperature, and sealed the valves expeditiously. He also gave knowledgeable explanations of questions I had about replacing valves and the leak detection process. Very reasonable pricing with no service call fee. Highly recommended!