We had a very nice stay at Khalisha's apartment in Milano. The flat is as previously described, huge, bright, comfortable in a beautiful building and perfectly located.
The only thing was the check-in/check-out procedure. Before arrival I got several different messages from different people regarding the arrival and the departure which I found a bit chaotic. Important to know : you cannot enter the apartment on your own, there is someone who has to wait for you in front of the building, and there is an extra charge if you arrive after 8 PM. Bearing in mind that two of the three Milano airports are at least one hour away by car from Milano's city center, it means you have to pay extra to enter the apartment if you are arriving at any flight after 6/6.30 PM.
In brief, I would definitely recommend this place for its' location and for the apartment itself. I would just recommend that the owner considers simplifying the check-in/out procedure.