Review on Electric Vitality Toothbrush Refill for Replacement by Richard Cheng

They are actually much cheaper than, say, Costco ($16 vs. $45!) or anywhere else. They are not branded, but they fit my Oral-B toothbrush perfectly. Like others, I had issues with them losing detail from time to time, particularly the little yellow blades in the corners. Once it falls out, don't try to put it back in. They won't stay and you won't want to accidentally swallow them. However, they seem to work just as well as their big names, so I'm pretty happy with them.