We spent a very nice time here!
It's a city trip so we spend most of the time in the city and not in the apartment but everything that we needed was there, very clean, very clever configuration with the code locks and a special locker to put your stuff if you need to check out but don't have a place to put your luggage.
I can really advise this place.
Praha 1 is 20min with tram or 40min by foot (took only 1 time the tram, the rest we went by foot)
A Lidl is nearby, perfect for cheap breakfast or meals because the kitchen has everything you need and some local beers to spend nights on the balcony and create memories to never forget.