I was given a contact name by Polaris that is selling their windows but with 'exclusive' features that regular Polaris windows do not have. They have a warm edge spacer that is supposed to seal better and longer to the glass than the Intercept ss spacer. For triple pane, foam filled sash and frame, 2 spaces of argon in casements the price seems too low. They have stated these are the Polaris Ultraweld with additional features, calling them Unishield. Any thoughts on a window reseller/installer like this? Has anyone ever heard of this situation?