Never heard of em .
Consumer Reports did an extensive comprehensive write up you should
But it seems as if you have made up your mind.
There are many factors- rateable performance characteristics going
into a good window SHG - CDF- U Value - Total at center U and R value ,
SHR , VLT. and more . Unless you know these terms and comparisons you
will have no idea if you aren't buying Crap.
300 instaled ? My simple install was 225 for labor only. And a
consumer Reports " Best Buy" window was 250. [ but poor performance on
CDF ] which i regret.
You really get what you pay for. That includes the instaler , which is