Philips Sonicare DiamondClean Smart 9500 Electric Toothbrush, Sonic Toothbrush with App, Pressure Sensor, Brush Head Detection, 5 Brushing Modes and 3 Intensity Levels, Black, Model HX9923/11

This is the third one I have owned. I read the reviews and it seems hit or miss. After 10 plus years of using the black diamond here is what I can tell you. If you press too hard (apply to much pressure) while brushing it causes slop in the sonic arm that the brush head engages. This arm has a gap set inside the handle and is held in place by a small screw. You do not need to push at all on the brush. If you do and the arm is wobbly and you don't feel the sonic motion, it can be fixed pretty quick. There are vids on YT that show you how to reset the gap and tighten the screw step by step, note use some locktite when reapplying the screw. There are also vids that show you how to replace the battery and actual upgrade it!! On the first 2 I bought, I applied too much pressure and was frustrated with the toothbrush. So I took it apart before trashing them and stumbled onto how to repair the $300 toothbrush. Phillips was of no help either. So you may ask why did I continue to purchase and repair the black diamond? Fair enough! Its because for 10 plus years I have had consecutively perfect dental appointments! Everyone of them! Very minimal cleaning, in and out in about 30-40 mins each visit and told keep doing what you’re doing. So its pricy, you need to know how to use it properly, Phillips customer service is ehhh, can be repaired and most importantly it WORKS! All three are still charging and working flawlessly! I have one for home, one for travel and a back up. Had I known you could repair them I would not have bought the second one. This one was on sale and ridiculously priced so I bought it.

Amazing product, not the best process with shipping however could've just been me.

Buen cepillo excelente vibración aún en la baja se siente mucho! Variedad de opciones y definitivamente si hay mucha diferencia entre un cepillo normal y uno de estos! La diferencia entre el 9500 y el 9750 es que trae un cepillo extra (cabezal) y la base de plástico para poner las diferentes puntas.

After 6 months, it stopped working! Waste of money

I've tried two different brushes of this model and had the same issue with both of them. Each time the brush broke after about a year's worth of use. The handle vibrates but the brush stem (the metal that holds the brush head) does not because it's detached from the drive shaft. There are several flaws with the design that could cause this to happen: 1. The metal drive shaft inside the handle is poorly constructed. It loosens over time and eventually detaches from stem holding the bristles. 2. The Internal adhesive or press-fit joints weaken over time and cause the brush stem to detach. 3. Moisture gets into the brush (likely through the top or near the buttons and eventually weakens the joint with the drive shaft. 4. The parts just wear out. Any one of these makes the brush unusable (unless you don't mind paying $200 for a manually operated toothbrush). Sure, you can send it back for a warranty repair (two-year warranty), but who wants to request warranty repairs (and be without your toothbrush while that's happening) multiple times in two years. No one expects a brush to last forever, but 10-14 months is unacceptable for such a pricy product! You're better off buying an Oral B iO series brush.