We got prices from 8 different window specialist for 24 double-hungs. The Sunrise came in well below mid range on price but had a build quality and feature-set that were better than most of the higher priced units. The sales approach by Window Replacement Company was forthright and without pressure and the warrantee offered was above average. I even travelled 50 mi to their showroom before buying to assure myself I would not be disappointed. Unique feature of these windows is a multi-position lock leaver that also allows release of the lower sash to tilt for cleaning. Foam core and fiber re-enforcement of the sashes and the foam band added to the outer frame were among the features that distinguished this window from the others.