Good value. The major sights are not within walking distance at all but the train/metro station is extremely close. Amenities like restaurants are nearby and there's a grocery store right around the corner. The apartment itself is as advertised - all the things you need in the kitchen and bathroom etc. The kitchen area is small but big enough to prepare food and cook. The bed is decent and the bathroom is a decent size with a very good shower -- good pressure, hot water, and height of showerhead (it's also detachable). The apartment heating was very good -- it uses a remote and heats the apartment up very quickly. The apartment heater makes some noise but can be turned off and on whenever you like (it will turn on by itself in the middle of the night, fyi). I used the washing machine twice and it's in good condition. Communication was very good, perhaps because it is run by a company, not a homeowner.
The only concern is that the walls are thin -- I could easily hear a TV at normal volume on one side and a family (which includes a toddler) on the other side. That said, I'm quite sensitive to noise, but worth keeping in mind if you intend to stay inside a lot. The building is very nice, clean, and safe, with a concierge always on duty. All in all, very good value and a comfortable stay!