I can safely say, after spending two weeks at Mark's flat he is now a friend. Great host with that, "cool as a cucumber" demeanor you want.
The place was comfortable, but if you're paying for this you aren't paying for the place you should get out and see the city if you're there. Go to Cobblestones, O'Neil's for some late night food (buffet until 11:30), Pablos Tortas, Bunsen Burger. St. Patrick's cathedral is also great if you're into that historical religious stuff.