I can only comment on my experience with plain black coffee but it is pretty bleh.... tasted stale like it had been sitting on heat for quite some time. There's also something wrong with the cups - twice now the sides of my cup caved in which of course means the lid won't stay on, which of course inevitably means that when I take a sip of it during a meeting, the lid will come off and coffee will spill all over my dry clean only dress. At least that was today's experience.