We rented our hot water heater from National Home Services (roughly $25/month)- not by choice. When we purchased our home we had horrible customer service to transfer the rental to our names. Time and time again we couldn't log online to view statements, had to call multiple times for the "re-set" to actually work. Calling is almost impossible for anything: Rings, you select your number, music comes on, you wait on hold maybe 10 minutes, then "click" your call is dropped. Our furnace and AC is new, they were purchased again by the previous owners through National and installed by one of National's "sub-trades"... the AC was installed so poorly we had to have a repair done through another company ($500 later), because of course neither National or their sub-trade offered any type of warranty. The previous owners had initially rented these units as well and bought them out. I was told by a representative over the phone (people laughing in the background) that they were my units and I can do whatever I want with them. Basically "good luck, you're on your own." The company we dealt with to repair our AC could see right away that the inital installation was "not the greatest". Huge warning flag right there!