The quality of these heads is terrible. I bought a package of four
The quality of these heads is terrible.  I bought a package of four.  The first head lasted about 3-4 months.  Fair enough.  The next two BOTH failed (stripped linkage) within 3-4 DAYS!  Am now on the last head and it's been ok for two days but I am buying a package legitimate Oral-B now in case it also fails immediately.
Rating: 1 stars