Me and 3 friends stayed here for 4 nights and it was perfect.
Reasonably good location about 10 min walk from most touristy stuff with some great restaurants/bars/shops on the doorstep too. The flat itself is very spacious, there was a wide selection of teas, coffee etc. Air con in each room was helpful as we visited in July and it's on the top floor so gets quite warm in summer.
All 3 beds including the sofa bed were very comfortable and sofa bed was easy to set up.
Both bathrooms (1 en suite) were great and there were 2 hairdryers. Lovely showers.
If I was trying really hard to think of any negatives I'd just say the skylights in one bedroom and the lounge have blinds that let through quite a lot of light and the other bedroom didn't have any blinds at all that we could notice. Only an issue if you're really sensitive to sunlight in the morning or have had too many beers the night before.
On the whole though it's exactly what you'd want from an airbnb and Josef was very quick to respond. We also opted for Josef to arrange us a private transfer from the airport right into the flat (just for peace of mind) which was ideal and only cost 25euros for 4 of us.
Thanks Josef & cleaners!