Katarzyna's place is exactly as pictured. It's a 2 min walk to public transit and you're able to get anywhere by using the train and bus system.
The place was cosy and extremely clean. I also appreciated that there were little extra amenities like a hairdryer and an iron (always comes in handy!).
Katarzyna was very accommodating and extremely quick with responding to e-mails and messages. She was helpful and understanding when we asked about an earlier check in and a later check out.
All in all, our experience at Katarzyna's was a very pleasant one.