I stayed at Costanza's place for 6 weeks, and it was GREAT!
Thank you, Costanza!

Here are some more detailed reviews of the place below:

Apartment:
-When I saw the pictures, I didn't really expect alot, but when I entered the building, I was surprised how much better the apartment looked. It was clean, comfortable, spacious, more pretty than on the pictures, and Costanza lived right next door, therefore, when I needed something, she was right there to provide and help.
-it's on the 3rd european floor (4th american floor) with an elevator. For those of you with heavy luggages, need not worry!
-The bedroom was equipped with a Futon mattress which was little too thin and gave me a lower back pain, so I went out and bought a firm foam matress to add underneath, and it became super nice bed to sleep on. Hopefully she will keep it there for future guests.
-Spacious kitchen with very minimal kitchen-ware, but I left some more bowls and a Wok which came in very useful.
-Bathroom was big but the shower was small. I stand 181cm, the shower ceiling had just enough height for my height which was alright, therefore anyone over 185cm would be little uncomfortable.
-you will get alot of Light in the apartment which is great!! windows and balcony doors were big for the sun to shine upon.

Location:
-3 minute walk to M2 green line "Piola" station. Very convenient! it takes about 20 minutes door to door on the metro to the famous Duomo in the center of Milan.
-Centrale station is on the M2 green line, so it's only few stops away
-about 20 minute walk to Porta Venezia where you can shop
-many buses and tram stops around
-30 minute Bus rides with only one change to Linate airport which I used multiple times and the cheapest way to get there. (1.50euro)
-I think it took me little over 1 hour to Malpensa airport with the metro and malpensa express train when I went to pick up my girlfriend.

Amenities:
-HUGE supermarket is located literally right next building to the apartment building which was PERFECT; didn't have to carry heavy water bottles too long.
-loads of restaurants and bars near by. One seafood sardinian restaurant was just few doors away which was quite nice.
-I jog, and found a huge beautiful park not too far away from the apartment which was a plus! Milan is not exactly a nature friendly city...so it was nice to walk/jog in the green park.
-WIFI Internet was slow but it did its job nicely.

I hope you guys will enjoy Costanza's place as I did very much.