Good: Will come to house anytime of day or night, although it will cost you a lot. Bad: Replaces with inferior parts not recommended by manufacturer (not OEM)and charges you a flat fee that includes the price of the parts even when the parts are free under warranty. Their guarantee is useless because if they find nothing wrong on the free tuneup visit, they will recommend upgrades required to keep your unit qualifying for their guarantee (usually starting with an expensive surge protection and a drain switch/alarm). Violated Texas Deceptive Practices Act many times over. Very rude on phone.. Improvements: Should work on Honesty, ethical, courtesy, kindness,... or be put out of business. Other: Have worst BBB rating of F. Under investigation by the Federal Trade Commission, Texas Department of Registration and Licensing and Texas State Attorney general for violations of many consumer protection laws..