The apartment itself is spacious, very comfortable, warm and has everything you may need for a short-term or a long-term stay.
The location is perfect - very lively area with lots of shops, restaurants and really close to subway station.
Lena was very communicative and replied quickly, also she let us in even earlier than agreed. Thanks for that!
The only thing that made our stay not 100% comfy was really really noisy neighbours upstairs. At first we just heard them talk, laugh and walk loudly, and some earplugs did help us to sleep soundly. But at the last night of our stay they threw a party for 30+ people and it was so loud that we didn't even manage to get to sleep and left at 3 a.m. to the airport (3 hours earlier than planned) because we couldn't handle anymore of that.
Of course, this is not Lena's fault, but please note that if you want to really rest after a long day then probably it may be hard at times.