After 16 years of hard working, my furnace went dead last week. I always relied on Mackay for the check up so I called Mackay. Sales person visited my house on Monday and they put new Furnace today (Thursday). They could come early I believe but I couldn't get day off until Today.
I only get a quote from Mackay so I cannot tell whether Mackay was cheaper than the other companies but I guess the price should be competitive, or possibly slightly higher given that Mackay is reputable company. When it comes to maintaining a house, hiring a cheap company is not always good idea, which I learned in hard way.
I cannot tell how well they did their job because I am far from techy guy but I was impressed by the small things, like the way they put carpet for the stairs (for protection), or the way they put pipes, etc. I believe these small things add up in the end.
My original furnace was on the ground but Mackay put some sort of elevation so that my furnace will be saved from possible water damage in the basement. That was a nice surprise.
All in all, I am very happy with Mackay.
Again, I've never dealt with the other company so I cannot compare Mackay with others but I believe Mackay is at least as good as other companies.