Awesome toothbrush.
I have been using the 30ss in its various incarnations for over 10 years now. The brush does a great job of cleaning the teeth and it is really fast.  The older brush did have some reliability issues but the newer ones seem to have the kinks worked out. I have found the company very accommodating in terms of replacing a brush if there was an issue. Excellent customer service.
Rating: 5 stars