I bought this after my dentist advised getting a good electric toothbrush due to possible gum issues. I did a fair amount of research in terms of what to look for in an electric toothbrush and customer reviews of various brands and models.
I settled on this one because it seems to have everything I was looking for and the only things it was missing were a couple of bells and whistles that really didn't seem to add much to the quality of the toothbrush and its efficacy for the job for which it is intended. Other models had Bluetooth connections to your cellphone with a downloadable app that told you how long you brushed. That seemed pointless as this model has a signal at 30 second intervals to tell you how much time you've used and it turns off at the end of two minutes which is "supposed" to be the optimal brushing time. I usually turn it back on for another 20 or 30 seconds to brush the tops of the teeth and to use the brush to clean the tongue.
As for how well the brush works, it works quite well. It has a high pitched sound that was a bit startling the first time I used the brush but it hasn't been an issue once I expected it. It also has three brushing speeds so that if the brush speed is too intense initially you can use a lower speed to build up your tolerance to the brushing speed. I always use the highest setting.
Once done I've found that my teeth stay feeling cleaner for a much longer time than using my old brush and my mouth feels cleaner in between brushings.
I am just another customer with no association, in any way, with the manufacturer but I could not be happier with this product. It does what it is supposed to do and it does it extremely well.