I have been purchasing Filtrete air filters for years. I change my filter every 3 months. I don't smoke, own pets, or have a fireplace so I am always amazed at how much dirt and dust has collected on the filter. I feel that purchasing the best available Filtrete 1" air filter is beneficial to my health.
I have used this product for over a year now and have found the amount of dust that accumulates on surfaces has been greatly reduced. This is very good for my family because 2 people have allergies. I do think the price is a bit high because I change the filters every 3 months instead of every 6 months and I have to buy 5 filters for our house.
We recently had to completely replace our air conditioner/heat pump. The technician recommended we get rid of the cheap paper filter that came with it and replace it with a Filtrete filter. At first we wondered if it was worth the expense, but this filter traps more dirt and gunk than I could have thought possible - and we had been breathing all of that in when we used the old filter.
We now check it regularly and replace it every 3 months as recommended and I believe the air in our home has never been cleaner.
The Ultimate Allergen filter has worked the best that any filter I've tried. I was given the inexpensive furnace filters when I purchased my home last year and I only used 1 because it just wasn't capturing the dust and dirt. When I switched to the Filtrete I immediately noticed the difference in the air quality. My filter lasted nearly 3 months so I was very pleased.