The location is amazing! It was great to walk along the pretty streets of Trastevere full of cafes and restaurants. It's convenient to go both to the Vatican and to the city centre from here.
The host answered and fixed the problem really quickly.
The flat itself looks even better than in photos. It's really spacious and stylish. There were many towels, an iron, a washer, a hairdryer and everything you need including wineglasses :) Also there was heating in rooms but unfortunately it still was kinda cold in a flat because wind was blowing through windows and balcony (in February). Besides we saw some small gray insects couple times and two of my friends got a red spot on the skin that looked pretty much like an insect bite.
Anyway I recommend this beautiful apartment! But it's better to stay here not in winter.