Daniel and Bea's place is beautiful. Here why you should go for it -
1. take right and across the street you have the main train station. it is that close. also tram stops are nearby.
2. the apartment is fantastic itself, you will find everything you need in abundance, and it is sparkling clean
3. there are nice places to eat, and mini markets within few minutes walk
4. most of the tourist spots can be covered by walking, for the castle you just have to take the tram no. 15 from stop next to the apartment (and then 22).
5. the hosts are always reachable, quick to respond, and very polite.
6. they will send maps and documents which will help you reach the apartment and check-in easily along with navigate through the apartment and usage of all it's amenities.
7. Prague is a beautiful city and we enjoyed our trip more because of the lovely apartment. highly recommended.
tip: not all tram stations have ticket vending machines but there's a tobacco shop downstairs next to the entrance where you can get tickets. they accept euros