This is a good small apartment, very nicely situated - within a walking distance form the center of the city and main sights, and also just a few minutes from the metro, if you need to go farther. We never saw Donatella, but were met by Anastasia, who was very kind to check us in at late evening - after 22:40 due to our late flight. And than Donatella was in touch with us via messenger - giving nice hints on possible routes and asking how we're doing.
The apartment has everything that you need - home equipment and kitchen utilities were nice. Only things that I would not rate high - were the hot water supply and a bed, which could be a bit more comfortable. Regarding the water heating - the small gas heater does provides heating and the amount of water that should be enough for one person, but if you travel not alone, or with kids - it won't be enough, and you'll need to wait some time for next person to have a shower. Also - even with the minimum settings of heating (that Anastasia kindly showed us on check-in) - the gas heater occasionally goes into a safe mode, and needs to be reset - via button, so not a big deal, but it's not in the bathroom - so there is a small quest :)
But all in all - the apartment has a great price/value ratio, is in the heart of the MIlan, and have everything you need to feel comfortable, so - its recommended.