SoniCare toothbrushes do a great job brushing the teeth, so much better than others I've tried as well as manual.  I greatly prefer this battery operated model to the rechargeable SoniCare Essence, because there is less bathroom clutter, and replacing the AA batteries every 30 days is much simpler than dealing with all the recharging and cord placement.  I'm currently using one that I bought for a trip in 2009, so it is looking old but continues to work fine.  More recently I've been buying this model for relatives.