All the waitresses are Italian (they also speak english), and the place just has that laid-back feeling restaurants and bars have back home; nobody seems to be in a rush and 80% of the customers seem to be Italians. They are specialized in a thing called 'piadine', a thin Italian flat bread typically from a region called Romagna, they are usually considered a savoury snack, but at Cacciari you will find their own dessert version stuffed with creamy Nutella.
The owner is a young Italian and decorated the place himself, i absolutely love how the place is decorated and considering it's situated in South Kensington, the prices are extremely cheap!
I have also tried their pasta and absolutely loved it, everytime I go it really feels like being back home, definitely worth a visit if you find yourself to be in the lovely area that South Ken is!