The Mini-Prep is so easy to put together and start using.  The lid is so easy to put on.  The mini chopper I had before I always had a hard time positioning the jar and then getting the lid on right.  I'd get so frustrated to use it.  Now, this one is a breeze and it chops several things in a short time.  The scraper that comes with it is also a plus  This was a gift from my daughter at Christmas and I'm so glad she found this one for me.