We spent 18 days in Claudia's apartment, and had a lovely time.
Clean and comfy apartment as per description. Big enough for 2 couples - the living room doubles as a second room with its private bathroom (even though it's quite small and the lay out of the shower is quite odd).
Very well located in a residential area yet near the Navigli trendy and young area with plenty of restaurants and bars. About 10min walk from metro stations, and within 5min from bus and tram stops. Beware though as Milan is big, and it took us well over 30min by public transport or by foot to get around any sightseeing spots. The alternative is by taxi which is pretty affordable (much more than Uber).
Communication with Claudia was on point and check in and check out processes were easy.
The only points to note are (i) the flat is located on the 3rd floor with no lift (it was tough for us on the days of check in and check out but otherwise pretty doable, beware though if you have elderly with you), (ii) the flat is not too well sound proofed from what's happening above our flat and in the stairwell (many times we got woken up by the noise in the middle of the night).