Interesting technology, but it doesn't do anything for me that I can't do myself. And at $200, I think I'll save my money.
If you're working in a kitchen and don't know how many teaspoons are in a tablespoon, then you have no business being in a kitchen. A kid that old who can't spell the word "cantaloupe" without help, rather than using an electronic crutch, needs some second grade remedial spelling classes. And if a parent can't spell the word "cantaloupe", they should sit alongside their kid in those second grade remedial spelling classes.