We love our NutriBullet Pro! It crushes everything from nuts to fibrous kale and makes every smoothie very smooth. The kids find it easy to use as well.
About 3 months after I bought it, the tabs on the big cup broke. It took another few months for nutribullet to cover it. They sent a medium cup instead of the large. Don't buy nutribullet.
I love using my NutriBullet for my green smoothies, but the rubber ring around the blade comes off every now and then. Yesterday while pulsing something kept making a loud noise - I open it up and the rubber ring had come off and was in the smoothie itself. It didn't damage the rubber ring, but it was annoying. Other than that I love my NutriBullet!