We stayed at Mike's place for 5 nights to work remotely and see some friends in Athens, and we thought the studio apartment was perfect for our stay! It's small, very efficient and recently renovated so the space feels very modern. There's a small desk as well as a kitchen table so it's possible for two people to work in the main room.
Note that the place is at the top of the Kolonaki neighborhood so be prepaired for a small hike to get there. Also, the water pressure in the shower is a bit low becaue of the altitude, but this is just minor inconvenience.
Overall we had a wonderful stay. Mike was very responsive and helpful with any questions we had. I can absolutely recommend staying there!