If you need a power toothbrush HoMedics you got to avoid, Braun is not good too (same as HoMedics but has bigger lifetime), another brand that sells one that looks good and has many small brushes that rotate is bad too, trust me I tried them all that exist. There is only 1 brush that works and that would be Sonicare, it is very expensive it starts at $60 I believe or $70 for personal edition but it's the only one that works. It's expensive but it works I gurantee you I been trying to find an ultimate brush for many years and I came to the solution of Sonicare. Homedics is a waste of $20 it has many flaus not counting that it does nothing, 1st of all its not sealed so the water gets inside the brush and it starts to rust and die slowly, 2nd it has very short battery life, 3rd it doesn't do anything, it may be good for someone with very expensive car to polish wheels on it if they have 2-3 days to spare per wheel (size). So if you want to take care of your teeth Sonicare is the only way to go, I recharge it once a month and have no problems with it, it saved me many cavities even thought I brush once a day, when I used to brush with a regular brush I accuried 6 cavites, 3 that were 99.9% root canal but the family friend docotor spend 1-2 hours per cavity to make them not root canal and then I couldn't use those teeth for 3 month. Now I use sonicare and I'm all good for 1 year
So there.
Enjoy.