We really enjoyed our stay. The location was great overall, though not right downtown. There is a Metro station about a 5 min walk, but we opted to walk downtown (took about 25 min).
The place is not large, probably the size of a larger hotel room, and the bathroom is teeny. But it is very well equipped, with smart hiding places for everything you need. It was also immaculate, which was awesome. And the bed was quite comfy.
The only caveat was that there really wasn't any closet space to throw your luggage. We were travelling with our 10-month-old daughter (and babies don't travel light!!), so it felt pretty cramped once we unpacked a bit, especially once the crib was set up. With that said, we did fine for a couple of days. The flat is probably best suited to a single person or a couple, or a family of three with a slightly older child that doesn't need as much stuff, or a crib for that matter (I think the sofa would be fine for 1 person/ child to sleep on).
Rita was so lovely. She met us at the flat and gave us great tips and suggestions for things to check out during our short stay. I can't say enough good things about her, she really was very warm and spoke English really well. We felt right at home in her flat.
If you don't mind being outside of the downtown core and walking/ taking transit downtown, this is an awesome flat. We would go back for sure, though maybe when our daughter is a bit older and travels more lightly ;)