When my furnace died during the January thaw I took it as good of a good of a sign as you can get. I took the time to get three quotes. Reliance was 30% more than the cheapest quote, and 15% higher than the guy I didn't like but promised an install 1 day earlier then the other two so I selected them. What a mistake.
Install was supposed to start at 9am, Took the day off so I could let them in and get this done. Got a call at 10am saying the furnace wasn't in stock and install wouldn't happen until next day (once the weather turned cold again.) After being very upset, the furnace magically (i.e. they drove it to me from Kingston) arrived at my door - but now they had nobody who could install it that day.
Next day, (another day off,) get a call at 9am saying techs would be late (appointment was supposed to be for 8am) as they had to pick up a Thermostat (they screwed up and didn't bring the Nest they had promised.) I said don't worry about it, ship it to me the Nest, anyone can install one - they still waiting to get the Nest - honestly, it only added 30 minutes to their trip, but they didn't tell me that until after they arrived and left me wondering if they were even going to show up...
Installers were not certified electricians, even though they were adding circuits to the breaker panel. Install was done after 14 hours.
Due to all the issues, Reliance finally agreed to offer me free rental for a period - it got it in writing as I didn't trust anything they said at this point. But I felt they had compensated me appropriately for the issues and my family was warm again so I took a breath and wrote off the week.
Then 15 days later I just got my first bill (no credit.)
I'm glad others have a good experience with them, all jobs can't go like mine with a 9 star rating, but I can't recommend them and would never use them again - they were willing to tell me NYTHING they need to so they can get the deal, then followed through on none of it as promised, and only after threatening to cancel everything.
Sorry - I told myself I would keep this brief and wouldn't write a wall of words, but it looks like I did anyway. Very upsetting experience.