This is certainly a hidden gem just past the main train station, in the area of Praha 3. There is a tram stop at the bottom of the hill from the flat which will get you into Prague centre in about 10 mins. The area around it is quiet and has a number of amazing restaurants hidden about, you just need to research, TripAdvisor was really helpful. There are a number of shops about including a lidls, at the bottom of the hill, so you can get groceries if you need them. The flat itself was very comfortable with 2 bedrooms and two bathrooms (one is an en suite). The kitchen was well stocked with all that you need for your stay, although it doesn't have an oven, it does have a hob, however the food in Prague is delicious, so who wants to cook.
All in all our stay was amazing and although the flat does sit at the top of a steep hill, it was worth the climb. I highly recommend Thanh Thao as host.