This product is at a [much] higher price point (roughly an order of magnitude!) than the film but could be interesting for some. We have very large (almost floor to ceiling wall-to-wall) single glaze windows where convection makes it uncomfortable and demands more heat-on in winter.
They responded well to my queries. It became apparent that since we already have honeycomb blinds the cost vs incremental benefit was not on for us, mainly because of the sizes in play and needing an all or nothing in the affected rooms being costly.