My wife and I were at the Home Show in March (2013), looking for some Patio Doors, where we saw Dima and Eugene from Visage. Dima shortly explained us what they have and how they do it without bragging about how good they are - they stuck with the facts, and we liked them; we actually wrote on their brochure "Favorite" so we'll distinguish them later at home from many others that we saw at the show that day.
So after that we obtained three quotes from what we thought to be the most suitable "candidates", because of the price range and their pre-contract customer service (they came in 3 times, and last time they brought the installer for checking the actual on-site conditions), we decided to hire Visage for the job.
We signed the contract (there were some changes we both agreed on after that), and after few weeks the installers came, spent some 7-8 hrs and the job was done well. I must say that I've warned them that I am picky and quite knowledgeable, and they didn't mind. I watched over they shoulders what (and especially how) they did everything, and with the exception of a couple of minor things they had to improvise (not all houses are the same), everything went the way I expected to go.
Conclusion: I am happy. And the reader has to know that I initially wanted to do the job himself (I am quite knowledgeable, but I don't have all the tools, and I may be a bit slow - you can't afford to stay with a hole in the wall for a couple of days). I thought that the price they asked for installation is not worth my effort and headaches.
For the record, they install Window City product (triple pane low E) - maybe not the best there are on the market (from what I researched), but definitely perfect for my budget. It's a product for regular people. Unless you want to spend $4500-5000 (to start with) for a simple 5 feet patio door, these guys are your people. (I am not a millionaire... and probably not become one soon).
Please note that at the show, some other window&door people gave us a $2000 ball park estimate figure and then when someone visited us for a firm quote, it doubled up! So you would need a written quote, don’t just go with whoever promises you the cheapest price. Try Visage, and I firmly believe you’ll be happy as well.