Makes short work of mincing an onion (once you've cut it up into smaller pieces.)  Perfect for chopping and mincing small amounts (such as one onion, garlic cloves, berries, etc.)  It is good for making mayonnaise (recipe included.)  It's rather easy to assemble and learn how to use, but you MUST read the instruction manual very carefully because the blade should go on a certain way depending on what you want to chop.  The blade is VERY sharp, extreme care must be taken, especially when washing by hand (recommend since the dishwasher would ruin the blade eventually.).  The motor is very strong.  I love this thing a lot.