these work fine! and are MUCH cheaper than the Braun branded ones
So far the one of these replacement heads (out of a pack of 4) that I've been using in my old Braun Oral-B electric toothbrush has worked just great. No problems, no loose bristles or anything like the bad reviews I've seen here. It's a perfect replacement, and is much much cheaper than the Braun brand replacement heads.
Rating: 4 stars