I have had the NV360 for three years now. I have cats and vacuum about once a week. I was still using the original filters so I figured it was time to replace them. I was skeptical they would be as good, but they seem like a very worthy replacement for filters. When I was shopping I saw reviews of small imperfections like gaps in fit, difficulty installing a HEPA filter etc so I was wary of these issues but they seem to fit snugly and well. Foam and felt filters - they appear to be almost identical to the original. They fit well. (Photos - top - old vs new. Bottom left - new filter on top of old filter. Bottom right - new filter in my vacuum.) HEPA filter - frame, adhesive and gasket all look the same. My original had an extra layer of mesh over the pleats. (Photos - first - old vs. new. Second - new filter installed in my vacuum cleaner.)