We stayed at the Aureus Clavis for one night during a quick weekend trip to Prague with our 9 month old baby.
Let's start with the pros: the hotel is in a fantastic location (about a 5 minute walk to the Prague castle, 8 minute walk to the Charles bridge, very close to the tram stops...), they also serve a complementary nice hot breakfast, the staff is very friendly and the rooms were clean and quite spacious. They also offered us a large crib for our baby, free of charge.
As for the cons: the rooms could use a little sprucing up (some tiles in the bathroom were coming loose, the bedding and towels are thin/cheap and getting frayed, there isn't a phone or coffee machine and the TV only had two channels), they do not have an elevator (which is a little difficult with a baby + gear) and there is rarely someone working in the hotel reception office (instead you have to speak with the restaurant staff).
Overall, we thought that the hotel met our needs: we wanted somewhere clean to sleep that was situated in a central, walkable location. If you're expecting a 4 star hotel for your honeymoon, this is not the place. But if you want a reasonably priced nice hotel, then this will do.