The last one I had was new when o ordered yours so I've not used yours yet. It will be due to replace in 6 more months. At that time I'll begin useing your product.
I just bought a 6 months supply of filters, much better that the ones I have been using BUT I still have 2 months of the old ones Ill use before starting my new MERV 11 filters. Ill post results when I have them.