These work fine and are a fabulous price!
I used to purchase these at my grocery or pharmacy and they would cost between $15 -$20 per package!! I thought these might be of inferior quality given their price but I was astonished to find that while the brush itself is slightly smaller than the more expensive ones, they are completely adequate to brush teeth properly. Actually,  having the brush be a bit smaller makes it easier to get into the "hard to reach" areas. These are a very good deal indeed.
Rating: 5 stars