I ordered a set of these toothbrushes, and even though I ordered the "GUEST" ones, I decided to keep them for myself.
They are basic toothbrushes, and they do what toothbrushes do. I have used two of them so far, and at my latest dentist appointment, my teeth are still fine. A fancy-shmancy toothbrush doesn't matter to me. This toothbrush looks great in my bathroom and keeps my teeth clean.
I will say, though, that they are serious about the three-month replacement. My second brush started to fall apart after the third month was done... bristles in my mouth was NOT a pleasant texture, but the other ones have been holding up nicely.