This is quite simply the best toothbrush I have ever owned. I was going to purchase a Sonicaire about 7 years ago, but on the advise of my dental hygienist bought a Braun/Oral B instead, because with its high-speed circular motion and small, round brush (she said) it surrounded and thoroughly cleaned each tooth. At that time I bought the more expensive dual-speed model (there are 4 different models, the 1000 through the 4000, with the 4000 being the variable speed top-of-the-line). My first Braun lasted almost 7 years before giving out, and I brush 3 times a day. Although this 1000 is a simpler model (I only need one speed), Braun has actually made some minor ergonomic improvements since 2006, which make a great product excellent. I recall from 7 years back that there was a few days of discomfort when I brushed (it is a high-speed, dental quality brushing), but that discomfort rapidly disappeared and now it is almost a pleasure to brush my teeth.