Seven coworkers and I used Petar's apartments for an off-site strategy meeting. It was great -- plenty of space to live and work comfortably for a week. Petar made the check-in and check-out process easy, even among several people. He also provided lots of helpful recommendations for eating and drinking nearby. The neighborhood is a short walk from the Acropolis, Plaka, and other tourist centers.
I would eagerly book this place again if I were going back to Athens. Two things I'll mention in case they're important to you: the neighborhood is a little rough around the edges, but we always felt safe, and the industrial vibe came with lots of new and delicious places to eat and drink. Also, the WiFi was good enough for email, but we found ourselves using cell connections as a backup for browsing or streaming.