Some years ago my dentist advised switching to an electric toothbrush (I'm sure it's advise many people got).
I went with this toothbrush because it was reasonably affordable and had several different head options.
Well it is still going strong.
One of the advantages of having removable heads is that the rest of the toothbrush doesn't go manky - although where the charger goes has collected a surprising about of debris over the years.
And of course the most important thing of all...it cleans my teeth well.
I have had mine for 10+ years now. It is still going strong with its Rechargeable base. Has an automatic 2 minute timer so I don't need to think about how long I need to brush. Replacement heads are available and easy to purchase. I get a mixed 4 pack from CW for $20. Have noticed such a difference from manual (on occasion) to my usual electric toothbrush. This one is affordable. If and when my current one dies, I will be repurchasing if not the exact same but definitely from the brand.