I bought this one to replace my workhouse, cuisiart prep7.  This one does not do as good a job even on high.  It bogs down with heavier blends, and is very noisy.   It is easier to clean than the prep7, and has a larger capacity so liquids don't bloop over and run down the sides.   I just miss my prep7 that I had replaced several parts, and it kept going and doing a great job.   I will do more research before buying my next one.