I’ve been using Norelco for about 15 years and with my current Norelco for about 3. I’ve been changing my blades on the current Norelco without issue but when I changed blades on with this current purchase I noticed that these current blades pull the hair on my face really severely. The first time I used the Norelco with the current blades I had about 3 days worth of growth. It was painful and difficult to shave. I decided to use the new blades for a few more days to see if there would be improvement. The next two days were a bit less painful but still a problem. I’m going with a different shaver.