Honestly, I'm still learning how to use this accessory properly, as there's a trick, for sure.  I've tried whole carrots, and used the thick slice disc, it was fast, but I did notice when you come to the end of the carrot, it's not as uniform as the previous slices, meaning the slicing became a little more elongated.  I'll have to use the book each time to put together and take back apart for storage and it's not as easy to clean as the pitcher type containers.