Not really Oral-B compatible
Such a tight fit that you feel like you're breaking your toothbrush when you pull them off it. (Which matters a lot in my case because my partner and I share the same Oral B toothbrush and just use different brush heads. Or that was the plan, anyway. He switched back to his regular toothbrush because he got tired of worrying that he was breaking my electric toothbrush every time he'd switch heads). Even after being pulled off and put back on a daily basis for over a month, the brush head never loosened up. Almost too tight to use.<br /><br />Bottom line: I'm okay with them being low-quality because they're dirt cheap (while the real ones are astronomically expensive) but irritated that they advertise themselves as Oral-B compatible yet barely are.
Rating: 3 stars