I am on my second Bullet. Reason, the blade part loses it's plastic rubber section around the top. This causes the sides to not close completely and the mixture to come out all over the base. It is very tough to clean.
I got one and really like it. You can put so much in and blend with about anything. I buy fruit that comes in large packaging. It goes bad if I don't make a "shake" out of what is there. It's easy to use. It's easy to clean.
I wasn't thinking of a diet. All I wanted was a fast way to get some healthy breakfast alternatives. A nice side effect was a 35lb weight loss and no more sweet tooth. I'm now on my second Bullet. My other one moved houses. Kids!
I thought this would be better than the 600 series I already have; however, whenever I do my protein shake, the liquid seeps out of the blender while it's on and I have to clean up the base each time. I don't over fill it and the blade is on tight so the liquid should not seep out. My 600 series does not do that.
I use my NutriBullet almost every day and love it. It's more powerful than my previous Magic Bullet. I was warned by another user to rinse the blades rather than submerge them in water as the seal isn't good and they will rust.