[This review was collected as part of a promotion.] I received the product for free as part of a product test. The Sonicare 5300 is a rechargeable toothbrush. Overall, it had an average performance at cleaning my teeth and was not that much better than a regular, non-electric toothbrush. It comes with a removable brush head, a handle that contains the rechargeable battery, and a base with a USB-A charger. It does not come with an adapter for the USB-A attachment. This makes it inconvenient to charge, because I have to have a USB-A adapter or computer with USB-A ports in order to charge the product. I only have one USB-A adapter, and use it, primarily for my phone. I have a dock with a USB-A adapter that plugs into my computer, and I don't want to have to bring a wet toothbrush into the room with the computer and plug it into that port to charge. I would like to keep it in my bathroom to use and charge, when necessary, without having to look for an adapter. I have multiple regular outlets readily available, and I would have preferred a charger with a two-prong electrical cord that plugs into an outlet. The instructions recommend dividing one's mouth into six sections, three upper and three lower. It beeps at intervals to remind the user when to move to the next section of the mouth. It took some getting used to that method. The brushing time is two minutes and beeps every twenty seconds to move to the next section. I would prefer that there were more options for time, because I like to brush the rest of my mouth also, so my options are to brush for another two minutes on the rest of my mouth, or brush my tongue, palate, and gums within the allotted two minutes. There are two settings for the intensities of brushing: low and high. There is no indicator light to show which is low intensity and which is high intensity, so I have to push the on/off button at least four times to get it to high intensity. It would help to have an indicator light to show low & high intensity. It says in the instructions that the 5500 model only has intensity settings, and not the 5300, which I have. There is a clear difference in intensities with the model I have, however, when I push the on/off button in succession. So, it is not clear if the instructions are correct that the 5300 does not have intensity settings. The directions were a bit confusing. They state that there is an EasyStart feature that gently increases power over the first 14 brushings and that the EasyStart, Brush Head replacement reminder, and Pressure Sensor Feedback may be deactivated or activated. I did not try to activate or deactivate features. I did notice, once, that when I brushed with too much pressure, there was a change in vibration and sound of the brush, to indicate to use less pressure. When I decreased the pressure, the vibration and noise went back to the usual settings. It feels slightly heavy to hold. The brush head vibrates a lot. If I opened my lips while brushing a small amount, especially on the high intensity setting, toothpaste would spray on my bathroom mirror, wall, and sink. It made a mess. I would prefer a rotating brush, because it seems more effective. After brushing my teeth, I have noticed residual food at the base of my teeth, even after I focus more brushing time on that particular area of my teeth. After using it about 16 days or slightly more, the battery indicator light went down from three lights to one. I'm not sure if there was a loss in intensity of the vibrations after this time. I did not leave it on the charger over those days; I kept it in a plastic cup. I did not charge it before using it for the very first time, as the instructions did not state that charging before any use was required. It was fully charged on first use. It never got to flashing amber and beeping 3 times after brushing, which is the low battery status indicator. The instructions state that the battery has a 21 day battery life. It's not clear from the instructions, at what battery level it is best to charge the unit. It is also not clear if it is possible to overcharge the unit, if I were to keep it plugged into an outlet at all times. Again, after using this product, I think it performs at an average level in cleaning my teeth, with confusing features, and an inconvenient charger base USB-A plug. I do not recommend it.