I was recommended by family to consider Gandy for my home central AC and HW Boiler replacement.
Gandy provided to me, what I thought were reasonable quotes for both systems. A Lennox central AC, and a Navien on-demand HW system. Both systems were pricey, and some would consider them on the higher end.
The installations was done very professionally and efficiently. Very happy with the attentive care and service provided. There were a few 'hiccups' during some work done at my residence, but Gandy's stepped up, and resolved them quickly, to my satisfaction, and with a 'smile'.
For ongoing maintenance, I opted to go with Gandy's comfort program. You pay a monthly maintenance fee, but get annual maintenance service included, 15% discount on parts, and front of the line service. I find this is worth the investment, as unexpected repairs can get costly.
The only counter points I would make of Gandys are: responses from queries on occasion have taken in my opinion too long, and their rates for product and services are pricey.
Overall, I am very happy with my decision to go with Gandys, and do highly recommend them if they fit within your budget.