I have. It's good enough, but it does have that gummy high-fiber texture that might be off putting to some. I eat alot of high fiber foods, and I'm used to and ok with it.
A serving does clock in at 80 calories though. Dunno if you're listing a less than full serving with the 1/2 cup.
I like the Fiber One 80. I eat it with Almond Milk and 1/2 banana. Low cal breakfast that's good for me. It's all in taste preference. It's worth trying at least once.