I did not read the fine print. Even though the "headline" said 16x25x4, all dimensions were less than that and filter was too small for my furnace. Additionally I did not understand about MERV ratings so the filters were much flimsier than I wanted. I ended out giving the filters away and am now more educated about what to order in the future.
Compared to brand name filters these are too small. I've had to build an open frame under the filter to keep the airflow from bypassing the loose/sloppy fit.