Ah, the Tassimo! Still the best single cup coffee maker in my opinion! Had one for a few years and then won a Keurig through work and since the Tassimo discs became harder to find, started using that. Side note, when in Germany back in November, I noticed Tassimo discs in all the stores, it just never really took off in the States.
Anyway, we also switched to the Ninja over Christmas and so far we like it. Although there are some mornings when I'm so rushed I wish I could just pop in a pod! I do wish the water tank on the Ninja was a little larger, we are constantly filling it! I like being able to add coffee to my cup to keep it hot instead of having to microwave my half empty cup.
eta: we still kept the Keurig, wanted to make sure we really liked the Ninja before getting rid of it entirely. I might bring it into work because the one here seems to be on it's last legs.