Location is truly amazing (shops, parks, tram stops, museums, yoga studio etc).
Communication with the owner was absolutely perfect: he was very reactive, very flexible, making sure everything will be perfect for me, extremely kind.
The flat is really nice, rather big, lots of space, a good mattress, a desk if you do home office. quite good furnish for cooking and living for 1 month. You will feel at home!
it's a typical Prague building, with a high ceiling, that creates a good sensation of space.
the building was rather quiet, and the area is quiet.
Something to know (not a problem though): it's on the ground floor (but elevated floor, so people in the street don't see the flat !), so there is no really light in the flat, i went there during winter, grey weather, it's was pretty dark.
2 tips to upgrade the experience and make it more than perfect: it will be better to have another set of towel and bed sheet (quite a challenge to wash everything and have it dry for the night), and a 2nd bed cover even if you are just one person ;)
It will be nice to have more thick curtains (at night, the lights of cars is quite strong. There is a few cars passing by, but when you woke up it might be a bit agressive :)
As you see, it's only details. I recommend you this flat!