Hi Homegirl,
My folks have just had Anglian in to do their house. In the main, they were very good. The quality of the windows was excellent and despite the fact it was quite a large house plus a sun room, they finished almost right on time.
Problems -
They added on another amount after they had started due to what they called "additional work". Make sure that you get a full and final estimate before parting with a penny.
Their contractor managed to put his drill through the dust sheet and into my parents living room carpet whilst fitting the patio door. The insurance only covered him up to the value of the carpet minus money for 'fair wear and tear'. So my folks were forced to pay £400 towards a new one.
Overall, I think they got a good product at a reasonable price. Anglian are not the cheapest, but like I said, they're good quality. Before you invite anyone around to quote, I'd have a peek on the Watchdog website just in case. You don't want cowboys!!
Rob