Our room was not totally clean (moldy corners in the bathroom stall, limescale, not properly vacuumed carpet, etc.), so that was a disappointment. Apart from that, it was great!
The location is very good - walking distance from Prague's castle. It's right next to a tram station so you won't have problems moving around.
The equipment is very modern and the bed was really comfy! The surroundings are really quiet. Perfect self-checking.
Overall recommendable.