We didn't have trouble finding replacement heads at our supermarket in the beginning, but now we can't find them anywhere. We resorted to buying another model of an Oral-B just to avoid the hassle of hunting online, but I just don't like our new model as much. When we first got the Pulsonic, we actually got compliments from the hygienist on how much cleaner our teeth were! When she asked what we were doing differently, I couldn't believe that I was the one recommending a product to the dental staff--it is that good. So I decided to go back to it, which means having to go online to hunt down the replacement heads. Maybe this would not be an issue if you guys didn't have so many different rechargeable electric toothbrushes. Retailers only have so much shelf space in the stores for the different brushes and all the different replacement heads. For a brief moment, we thought we spotted some replacement heads that would fit, but when we read the back of the package, it specifically mentioned that they do not fit the Pulsonic. This frustration is making me not like your product, which I don't want to do--I want to keep liking it! But truly, you have a bunch of different rechargeable electric toothbrushes--is this necessary? Really?? You should get rid of at least half of them, and focus on improving the quality of the ones that consumers like the most, and then make it convenient for getting replacement heads. I read all the other Pulsonic reviews, and although my toothbrush works fine, I shared a lot of the frustration and agreed with some of the suggestions. So for these reasons, my rating averages out to 3 stars.