Stayed a few times. Very nice and high standard of finishing. Noise insulation is decent.
It's great for couples. Pool temp is for swimming but not for Jacuzzi which shares the same water.
More than twice the cost of the DT is the premium for the location, though its the going rate for other 5* in the Old Town.
As the DT is a very high standard, with a great spa, and taxis are cheap as hell, it's not a slam dunk.