Having tried many different toothbrushes including electric and sonic types but none of the toothbrushes have compared with the easy of use of the RADIUS. My mouth is quite small and I was initially concerned I might not be able to adequately brush my back molars, but this concern was totally unfounded. I love the wide coverage, gentle bristles and the long life of the RADIUS - in addition my dentist commented during my checkup upon my brushing skills. I had to let him know it wasn't my technique that changed - just the brush! This brush is WELL worth it's price and I'm looking forward to getting some for our children!