Reviews for the Ninja Blender and Nutribullet are comparable on Amazon.com. The Magic Bullet Nutribullet Pro 900 Series Blender/Mixer System is rated 4.3 out of five stars, and the Nutri Ninja Pro is rated 4.5 out of five stars.
The Magic Bullet Pro 900 Series Blender/Mixer System and the Nutri Ninja Pro are similar models. Each has a 900-watt motor and is relatively small, at 11.6 pounds and 8.2 pounds, respectively. Reviewers for both the Nutribullet and the Ninja Blender say that they are powerful and easy to use and clean. Some reviewers mention that they don’t take up very much space.
Nutribullet reviewers are impressed with its ability to blend even difficult foods such as seeds and carrots. Ninja Blender reviewers appreciate the blender's power and also like that the blender is very quick to use and is less expensive than Nutribullet.
Negative reviews of the Magic Bullet Nutribullet Pro 900 Series Blender/Mixer System say that it does not last long and that the company would not honor the warranty when they tried to replace parts. Negative reviews of the Nutri Ninja Pro say that it leaks and that it does not blend harder foods such as apples and carrots.
Overall, reviews on Amazon indicate that customers have similar experiences using Ninja Blenders and the Nutribullet.