Home window UV filter

We recently bought a westward facing house that gets brutal sun in the afternoon. While inquiring about curtains, the salesperson first recommended we consider UV light filtering films as a first option to reduce UV light (and related furniture damage) and heat. The original quote we have is nort of $6k, which is not a surprise because the winders are large, the house is old, and one room alone has nearly 200 small window panes.

Query - does anyone have any experience with the light filtering UV films? Do they work? Is your house significantly cooler with them than without? If not significantly cooler, noticeably cooler?