I hired AWP Advanced Window Products to install ten single-hung windows for me. They weren't the lowest price out there, but they gave me a good price. AWP did the installation all in one day. I didn't have to call them back to correct anything. Some of the other companies I called promised to stop by for an estimate but then they never showed up. AWP Advanced Window Products made and kept a specific appointment. It worked well for me. I recommend this company! They do a good job.