DON'T USE WINDOW WIZARDS!! All these good reviews so suddenly so close together reeks of management stuffing reviews. Here's what happened to my house. They damaged the window opening inside and out when removing the admittedly hard to remove original "flanged" windows. They "capped" the outside to cover the damage to the siding but less than a year later water started coming inside to tops of the windows. (They never did come back with the promised matching moulding for the inside)
When it came time to put in more windows I asked that company to take a look at what window weasels did and to recaulk he took a look at the job they did on the outside he had to rip it off and reinstall everything all over again. There was no wood or j-channel behind or next to the capping and there were giant gaps between the original siding and the windows right through to the inside drywall - which explains how the water was getting in.
Save yourself a nightmare and find somebody that installs a quality windows. I got some nice Simington units for less money and a better warranty.
I will say that the ladies in the Bristol store were sympathetic and tried to help but the men were rude.
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