Myself and my husband just spent 1 night at Marvin's place and the location is perfect. close to city center and obviously it has pros and cons.
The room's size is very good, big wardrobe and comfortable. We were there during the hottest week of the year, the room was very hot and it doesn't have a fan but this is a very single situation as we are in Ireland and usually it's cold.
The bathroom is common use and was very well supplied and clean. The kicthen is also a common area and very organized and cleaned.
The room n.01 is in in front of the street, so, the noise from people talking, cars, horns can disturb you. as far as I could see, the other rooms doesn't have to window to the street and they might be quieter. As I mentioned, it was very hot and we slept with windows opened. If the windows are closed the noise will be reduced but you can still be bothered by them. if you are a good sleeper or if you want to spend the night in the city center, you won't care.
I would've booked again!