We stayed for 2 weeks, but that's because we do the whole digital nomad thing, so really most people would only need a few days to explore. For a few days, this place would be great. Walking distance to all the main sights, and you're right in the thick of it all.
Beds are hard, but maybe that's normal for Turkey. WiFi worked fine. Could also be a bit cleaner, as we found some dust on places like the lights near the ceiling, etc. Also, you're close to many mosques, so make sure to say hi at 4:30AM for the before dawn prayers.
Taner is an amazing host. Arranged pick up and drop off for the airport, super quick and helpful with all his communications, and helped us with our bags. Great person.
Overall, excellent for short term, but maybe not for longer stays like we did.