Greetings,
I need to replace seven basement windows and have settled on vinyl sliders for the 38x25 brick openings.
I've been to a zillion different web sites and read about different manufacturers (Alside, Gilkey, Feldco [local], Thermal Industries, Simonton, American Craftsman...) and what it seems to really boil down to is the installer. A lousy installer can trash the most expensive window and a good installer can make the most of the low- or mid-range products.
I've read online reviews until I'm cross-eyed and again, but while window brands may be available nationally, the install is truly a local issue and reviews aren't numerous enough to be meaningful.
So, how exactly do you know that you're hiring a quality installer? The big box sub-contractors are such a crap shoot, and although Sears Home supposedly stands (eventually) behind their installers, they were very pricey, meaning I'm paying for someone's bad install, somewhere.
~JMA