The location is absolutely amazing: in the middle of the historic centre, many major attractions, great restaurants, authentic art shops, bars, etc. are literally just around the corner. Despite the lively and cheerful Southern Italian athmosphere outside, the apartment itseelf is quiet and remains comfortably cool also in summer. The accomodation is very spatious (4 separate bedrooms and 4 bathrooms) and has a very nice, private terrace. It is also very nicely desigend and furnished. One can immediately see that the owners themselves are architects and artists, who care a lot about providing something special to their guests.
Communication with Alessandra was also great. She always replied immediately and organised, at our request, two guided private tours (one to Pompeji and the other through the historic centre of Naples). I highly recommend taking such tours: Alessandra organised everything perfectly, including private transport to and from Pompeji, and the people she works with (taxi driver and guides) are as friendly and competent as she is. The price for these tours was also better than comparable online offers.
All in all, Aleph Design Apartment and Alessandra are among the very best travel experiences that I ever had - and I have been traveling a lot, for a long time.