The kids' dentist suggested that we get the inexpensive kind from the drugstore. She said they worked as well as the expensive ones in her opinion. I got one for myself, which may not have been such a good idea. I have one tooth that had such a big cavity that they had to build up the side of the tooth as well as the interior. I just started using the electric toothbrush two weeks ago and I think the vibrations were too much for that filling - it fell out last night. If you don't have any problems like that, I think they're very good and certainly make it easier for the kids to do a better job.