I've tested many of these "personal blenders" "Bullets" and this one is by far the most powerful and best quality. The cups are the right size for smoothies, and the motor is fast and has enough power to blend frozen fruit or vegetables. The cups are smoothly molded and the lids are perfect to insert a straw and sip your smoothie. Right out of the box, washed it up and made a strawberry-protein smoothie and it was absolutely perfect. I like how the controls are angled on the top for easy reading and access.