I have had my SoftLite Bainbridge Vinyl Double Hung windows for about a year.
I am very happy with the look and performance of these windows. My Maryland house was noticeably warmer/cooler and quieter this past year. No leaks or any complaints. I chose the Bainbridge because of their thin profile, soft, not bright white finish, nice finished looks and moderate price. I decided on these windows after much research, especially on this forum. (Thanks again guys!) That's it!