I cannot add much that reviewers have said. Yota is a most kind host, offering recommendations if needed.
Some have mentioned the bath/shower. Being a tall person 6ft2 / 188cm, the shower was a bit of a challenge. My advice if you are like me, stand facing the window, back to the curtain. You'll get used to it and more efficient. The bed is converted from the sofa. I have had back problems in the past but did not have any issues or pain so it served the purpose. The view from the massive balcony is really amazing. As Yota mentions, the apartment is a bit 'up hill' if you arrive by metro, it does get easier the more you walk but the first time with a bag is the 'longest'. If you are using a rolling bag, probably best to stay off the sidewalks. When walking on sidewalks, pay attention to your steps as it can be uneven in places.
Back to the apartment, you are away from high tourist areas but those are easily reached via metro (possibly one of the cleanest and easy to use I have encountered). There is a lift but you can use the stairs if the walk from the metro wasn't sufficient. There are supermarkets not far away.
Also recommend metro day passes, I think you can get up to 5 days. Makes getting around very easy.