Me and my girlfriend had a great stay in Prague in hotel Alfons.
The checkin was easy to do, the members of the staff always replied quickly to my request and were really kind.
The room was pretty big and clean. Moreover, the hotel is very well located and you can easily walk from there to the old town. I would definitely recommend it.
If I had to give a bad point, it would be for the insonorisation of the room (we heard quite fast if someone was in the corridor).
Thank you again for this amazing stay in Prague!