I had one previously. I found this models water container wasn't up to the quality plastic of the prev model & was very disappointed that the toothbrush portion didn't come with a cover for the brush, as it has to be kept on the charger I would prefer a cover for the brush portion rather than a travel case.
I was recommended by my dentist to buy this product. I was very skeptical at first but I LOVE it! I don't have to floss anymore because the waterpik does it for me. I mentioned the waterpik to my dental hygienist and he said he was unsure of it too until he started to use it on the recommendation of his other patients. I use it everyday.
My husband's dental hygienist suggested a Waterpik. I don't know why we never tried one before. I did have a battery-operated flosser and wasn't impressed so that may have colored my opinion. But the Waterpik is great. My mouth feels SO clean after using it that I don't even feel like I need mouthwash anymore (though I still use it). This particular model also comes with a two-speed sonic toothbrush, and that is also great. (I used to have a Sonicare and this is similar but has the advantage of being attached to the Waterpik.)
I like this product so much, I use it twice a day and almost never skip (unlike flossing). The price was quite reasonable for this unit, especially considering the costly mouth problems it can prevent. I would highly recommend it to anyone interested in being proactive about their dental health.