Head comes apart after several weeks use.
These Oral-B type copies look just like those from Oral-B but they aren't.  I'm on my 4th head and all three of the ones I've used the lower brush head came off.  They didn't come off until it was close to time to replace the head but they still came off.  I've used the Oral-B heads for years and never had that problem.
Rating: 1 stars