First off, all HVAC service companies are _not_ the same: the differences in quality, integrity and what you get for your $ are vast!!!!!!! I was impressed with Hall A/C immediately: the only company of all I called that *instantly* gave me a quote over phone... to include service fee + price per LB of 410A Freon. The gal taking my call told me on the first contact! As you may know, others don't know, are reluctant, or worse -- will instead try to sell you a diagnostic/tune up -- which turns out to be a filter change, some minor cleaning, screw tightening, and basically and a bunch of nonsense you can do yourself. And worse, when they leave post "tune up", you might still be low on Freon (it happened to me). Not so with these guys. No sales pitch for junk I don't need, just a straight answer to my direct request. They also had the best price quote. They delivered the Freon service for the price exactly as estimated: I was permitted to see the Freon tank on the weight scale, so I could know how much was actually being serviced into my unit; to know if I was getting what I paid for. And the guy did it right -- measured line temperatures, changed A/C settings, re-measured indoor differential of intake and output air temps, serviced some more -- all by the book if you know a little about Freon servicing. A real, courteous, professional who kindly answered all my questions and didn't mind one bit as I stood by for quality checks. Now -- for the first time since installation in 2008 -- my 2.5 ton cheapy Amana cools my *whole* house during the 100+ days of Texas. I'm confident that, for the first time in its life, the unit is fully serviced with Freon. (Cuz -- you know -- Freon is so "expensive". Grrrrr -- you'd think a $7000 installation would include fully serviced Freon -- but I guess not.) It took me a while to find a great company like this - and I owe it in part to Angie's list. Reading reviews here by others, it sounded like these guys would be who I was looking for, and they are. I'd like to tell you about all the nightmares and rip offs I've endured with other companies, but this isn't the place for that. I just wish I had found them sooner -- wish they installed my unit in 2008. But then, maybe I wouldn't appreciate them as much. Can't say enough good things about Hall. Great first impression - integrity and quality to the core. Would use them again, no doubt.