I Do Not Recommend Windowizards.
The only pleasant experience with Windowizards was the contractors that installed the windows. They were very nice. The casement window handles fell off. It took over 4 visits to have them replaced with the proper handles. They will change their quotes without your authorization and the customer service is non existant. The ladies in the warranty are rude. I would not recommend them at all.
Don't do it.
They entice you with 'coupons' and financing promotions, but these are really ploys. The coupons have no real value, they are only meant to draw you in. They will not return your phone calls, they will overcharge you, they will not install the product you ordered, they don't even know that much about their product. Find someone else, Window Lizards will burn you!