The blade part leaks black lubricant after a few months of average use. When you contact warranty they say you're supposed to replace that part every 6-12 months but that information is only in the FAQs online and not in any of the material provided when you purchase the item. We got a new blade and after 3x a week use it's leaking the black lubricant again after 3.5 months. 

Also there are no measurements on anything, which is really inconvenient if you're keeping track of portions.