This Ninja works fairly well, especially for the price.  However, It's a bit of a pain to use with the various parts & since you have to line up the top of the blade with the hole in the top of the cap.  (I find that I miss my old Oster blender that was all one piece with blades at the bottom.)  And the plastic parts aren't as strong as they could be.  My teen used it & stripped the plastic end that sticks up into the cap, making it un-usable.  To their credit, however, Wayfair replaced it!