Use local everytime, we did, they are always price conscious and the quality in our experience is as good as anything out there. The best part of course is that if you do have a problem you are dealing with a local company who actually care about their reputation (if you choose the right one obviously) we spent quite a bit of time checking out 3 locals and the one we went with is first rate. I really don't understand this outdated sales technique regarding double glazing these days, don't these companies understand that there is something out there called the internet? Offering a price and then using the "oh let me phone my manager and see what we can do" is more transparent than the glass they use in their windows!!! This is what they used to do 20 plus years ago when there were only 3 or 4 major national companies to choose from. Local for me everytime.