Cleanliness, and a willingness to make your stay comfortable were the best qualities.
There wasn't a hint of dirt or mildew anywhere. Sheets and towels are laundered daily on site. Extra pillows were available. It wasn't cold enough to need blankets, but they were in the apartment. There is a small kitchen counter with a 2 burner hob, a sink, and the fridge. Plates, mugs, etc. are in cabinets above. Definitely bring your own food or snacks. In the kitchen alcove, there was plenty of space for a table and chairs. There is also a hanging closet on the wall opposite to the cooking/cleanup area. It is set high enough on the wall that you can store your luggage below it.
The main area is not cramped, so it is easy to navigate without feeling jammed in. I like space.
This is a family-run business and someone was always available to find something you needed, e.g., a spatula when my husband wanted to fry some eggs and they could tell you which store to find the eggs at too. they know their area well.
That said, let me add that they never "pushed" any place or activity. We appreciated that a lot. They are just nice and helpful. The watermelon from Mrs. Vasilis' garden was a very tasteful gift!
A good, roomy balcony with a pleasant view of the sea, combined with an excellent cross breeze when the front door was open were lovely.
There were a table and chairs for outdoor use.
Wi-fi worked well and was stable. The TV also worked.
We liked being able to keep cool drinks in the fridge as well as a bag if ice we bought at a nearby grocery.
The studio was very hard to find. Our problem was compounded by getting off the bus at the town at the top of the hill instead of at the harbor at the bottom of the hill. Without phone service due to no charge left, nor wifi for the iPad, we were well stranded, especially as we couldn't figure out where we were.
We thought we had directions straight, all I can say is double check! Without wi-fi, we couldn't check at all once we were there. The map I screenshot did not match our reality.
Eventually, the folks managing The Cafe figured out what had happened and helped us out. They make excellent cappuccino there and that also helped.
We did almost get scammed by a car rental (Dmitris) in the process of getting to the Vasilis Studios. Witnessing the shouting match that ensued between husband and wife was awesome, I've never seen anything like it. Is this tourism?
To balance that episode, another rental agent who was out of cars went out of his way to borrow a car in which to personally rescue us. Thanks, Nick!
While all this definitely had a comic side of almost epic proportion, I wouldn't recommend it for a normal entry to Kos.