I've been looking at this item for about two years and finally gave in to buying it. I'm happy I did! First, the Foreo Issa is magical--alone it warrants 5 stars. I'm using the silicone brush head and find it to be as effective as my normal toothbrush. My teeth feel clean, and I don't see any build-up around the gum line. It's easier on my teeth and I don't have to worry about an errant brush stroke tearing up my gums. The inclusion of the hybrid bristle head and tongue cleaner was a nice addition with the toothbrush.
The Marvis toothpastes taste good, but are costly if purchased individually. To me getting to try the brand was an added bonus for buying the kit, but I intend to go back to my normal toothpaste when I run out. IMO, Marvis is sort of like the Apple of oral hygine--you're paying for exclusivity. BL: Treat yourself to the kit if you're interested in trying the Marvis brand. But know it's a toothpaste. If not, buy the Issa alone. Either way you can't go wrong.