Super Soft and Comfortable Fit! I got a sample of the Sonic Pro replacement head at my dentist office and loved it so much I had to hunt down where to purchase them. The bristles are so incredibly soft and the perfect size head to make brushing with your electronic toothbrush a great experience. I used to hate using my electronic toothbrush because the bristles were too hard and the head too large making my brushing experience uncomfortable. If you have sensitive teeth/gums, they also have a sensitive head option which is even softer.

Well made website -

Quality and Comfort A+ Quantum Eurotech charcoal toothbrush is the most comfortable and stimulating toothbrush I've had in years. Outstanding quality and comfort, which means I'll use it! Quantum's website is easy to negotiate. Product arrived quickly without issue. A+

My favorite electric toothbrush head I use my Sonic Pro much more now that I discovered Quantum Labs Ultra Sensitive brush head. With the original heads, I was only doing it at night, and on the medium intensity setting. Now I use it morning and night, and on full intensity. Thanks to my hygienist for the sample! I received the order in seven days. It was kinda "old school" in that I didn't get and email with tracking number it shipped, but it did ship promptly after all. Only downside is that I had to buy 48 heads, which, even if I change once a month, will last longer than the toothbrush.

Great Price and quick shipping Great Price and quick shipping, Although I couldn't understand why I got a bag of candy...