There is not much difference in the size and weight all told, only a few grams but sit them side by side and we think that most would prefer the in-hand feeling of the Smart 5. Whilst reading your reviews of this item I see that this make and model goes back as far as 2017 and I’m somewhat concerned that my friend has spent far too much for a toothbrush that has many newer models.

BUT, one of the biggest flaws of the Smart 5 is the fact that you can’t easily tell what cleaning mode you are using. Along with the 5000, this is one of the only brushes to actually have been officially approved (with a Gold seal of approval) by the British Dental Association.

Both have visible pressure sensors, but the 3000 has a 360 degree sensor that wraps around the neck of the brush, compared to the rear mounted (approx 180 degree) sensor on the 2000. Oral-B's iO Series 6 has real-time tracking which provides more useful feedback on your brushing habits, allowing meaningful improvements to be made quicker. However, some brush heads are better suited to certain modes and it would have made more sense in our opinion to have included the Sensitive head given that one of the selling points of the 3000 is that cleaning mode.

Smaller and less unsightly, it is designed to sit on a worktop rather than adhere to a wall or mirror.In our testing, we were able to get 66 minutes of usage time from the rush, which equates to 16 days use. The second was in which it helps is through the more powerful Bluetooth connectivity and smartphone app. A display has been built into the handle that allows you to control certain features of the brush and gain some real-time feedback without the need for the smartphone application. I general, I guess I'm happy with my purchase and I'll continue to use it until the unit dies but I'll then go back to a manual.

This ultra-smart electric toothbrush gives you professional guidance on getting the most out of your brushing experience.

If this is not enough, a USB cable can be connected to the case and charge a device like a smartphone. This is a vast improvement over the “old” Oral-B Smart Series 4000 whose Nickel Hydride battery only lasted 1 week. Let’s talk first about brush heads, as they’re the unique thing that come with this Oral-B electric toothbrush.

Both brushes offer Bluetooth connectivity, which means that they connect to an Android or iOS smartphone via an app.

My old charger burned out when I tried to use it with a transformer in a former country, so I'm also happy that the new charger will also charge my older brush.