I received a quote for $4 per pane - when they did the work, and only after did they say to my wife 'yeah, it's gonna be $6 per pane, there was some sticker residue on the window'. Every window? And after we had already cleaned them once already? Doubtful. What an honest business would do is at the very least say early on in the job what the issue is and that it will cost more. This company is not honest, and does not adhere to best business practices. Will never use them again.