We stayed for 5 nights. The flat is very clean and modern with everything you might hope to find in the kitchen.
The bubble bath was lovely though I don't recommend putting in actual bubble bath as we did because the bubbles quickly got out of control!
The location was perfect, there is a cheap pizza/pasta place round the corner and all the bars and restaurants of navigli are 2 mins away with the subway being just on the other side of them.
Lucio was a very keen host and I'm certain if we had needed any help he would have been more than happy to.
We found it to be the perfect base from which to explore Milan as we could tour the city in the day, drink/eat in navigli at night and relax in the flat with a bottle of wine and a game when we didn't feel like going out.
We would stay again if we ever returned to Milan.