Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great product but don't forget ...

This is the best electric toothbrush I've ever owned. I'm not sure if I can name the other brands but I've used the popular names. I like this one for a few reasons. (1) It was recommended by my dentist who said it was safe for dental work. (2) It works very well. Cleans you teeth as well as an office visit. (3) You can use any tooth paste. One of my previous electric toothbrushes I had to use their paste. I did not and damaged the gears in the hand unit. (4) It cleans your teeth very well (had to say it again). I am amazed at how well this product works. Remember when you are considering purchasing this product that Sonicare recommends changing the brush heads every 6 months so there is an addition cost involved. I suggest the PL-4 since you get 3 brush heads.