Review (5/5): Low cost replacement heads are a bargain!
Compared to OEM pricing these are a bargain. I was apprehensive about the low price compared to Philips Norelco replacement heads. However, these are of good quality and I recommend that you try them. I followed the guidelines about applying a small drop of baby oil (I used mineral oil) on each head. Just run the shaver for a minute before shaving the first time. This seems to make them work smooth and they give a very comfortable shave. I am glad I took a chance on them as they have given my old shaver new life. I'll use these until the rechargeable battery fails to hold a charge.