I have been using this brush for several years. I keep two for backup just incase the battery dies, I get sick (I always replace my toothbrush after getting sick), or it gets lost or damaged in one on moments of clumbsyness! Performance/Cleaning It always makes my teeth feel incredibly clean. It removes plaque and gets into hard to clean crevices. It also massages my gums and leaves my mouth feeling fresh. The bristles are soft enough not feel harsh in my teeth or gums, but strong enough to remove any built up residue. Durability I am constantly dropping things and breaking things (especially in the morning before I've had my coffee!) This tooth brush holds up amazingly well. This brush has survived several falls onto ceramic tiles. I have only cracked one brush that landed hard on the small end. The battery has a long life, and I've never had to replace a brush because the battery died. I always replace my toothbrush every 5-6 months.