I recently bought a Kashi Protein Bar at a convenience store, really out of curiosity.  It has the Kashi Go Lean cereal in it, and was peanut butter flavor.  I don't remember exactly how many calories, but it was 5-6 Weight Watcher Points, so probably about 280 with several grams of fat and fiber.  I had bought it for a snack, but when I realized how many calories it had, I saved it for a meal replacement.

It was larger than a Quaker bar, and very chewy, so it was quite satisfying to eat.  I ate one for breakfast; and  noticed that after my usual morning exercise (swim laps + water aerobics class, total 1.3 hour) I wasn't quite as famished as usual.  I was surprised at how substantial it seemed for a meal replacement, and it tasted pretty good, too.  I don't know if they come in other flavors than peanut butter.

I thought it tasted a lot better than most of the power bars I have eaten.  But I would still prefer eggs, bacon and hash browns for my canoe country breakfast.   ;)

That's why I need Weight Watchers!