I love having this option for healthy and convenient food, especially in hot weather when the last thing I want to do is turn on the stove. However, I've had a few incredibly frustrating and potentially injurious experiences trying to open the cup. I finally managed to loosen the blade component with both hands while holding the cup between my thighs in the bathtub. It's hard to tell how much to tighten the blade so the cup won't leak into the motor part and you'll still be able to open the cup after blending. In retrospect, I would rather have a traditional blender, at least if I had more counter space. I would not recommend this product to anyone with small, weak or arthritic hands. Also, it would be helpful if the Max line were indicated on the cup more prominently, and in white as well as in black (so you could see it when there are dark ingredients in the cup).