This Ninja blender is sharp and powerful. So much so, that I actually nicked a finger on the blade and got scratched. I was so used to my old blender blades being dull that I had forgotten how sharp a high quality blender blade should be.
I love the extra cups for making a smoothie on the go.
The only downside for me is the size. My previous blender was bigger, so I could make much more smoothie at one time, but that's a minor inconvenience compared to how much better this Ninja blender is in quality.