If I could give zero I would, keep away from this company, they do a good sales talk which we were drawn into. They installed our boiler wrong which eventually got sorted but the door does still not close properly. Had to wait over 2 years to get our boiler serviced we finally got it serviced a couple of months ago after loads of calls and emails which no one gets back to you. We were looking to sell our house and no one told us that they put a restriction on our house with the land registration so could not sell house till the full amount was paid off, this caused major delays in the sale process. You can only pay the cancellation sum off annually even though you have paid a lot of payments during the year, this amount is not included in the final payments, a real con.