I received my NutriBullet 900 for Christmas last year. I use it frequently and love it. I make smoothies with veggies, fruits, juices & yogurt in loads of different combinations and all turn out fantastic and smooth!!
The NutriBullet PRO works great for green protein shakes and for small batche's of blended ingredients. I use it at least once daily. It is also convenient to take on trips for protein shakes.
Unfortunately, after 4 months of using my NutriBullet to make 1 smoothie a day, it stopped working all together. It had become increasing difficult to to apply enough pressure to make it engage, and then impossible. Did a great job when it was working, but didn't last long!