We have used Natcon to do other jobs in our new home for the last 2 years. We trust their work and would recommend them. Reasonable estimate of cost. Once a date was set for the work, work commenced and ended in the timescales quoted. The new window has made quite a difference to the usability of the room. The quality of product is great – on delivery there was a few chips to the beading. This was sorted quickly the next day.