We stayed just one night at Marvin's and didn't actually have a chance to meet him personally but our staying went on smoothly. The self check-in is by a safe box and it was just "the thing" for us since we arrived at 3 in the morning. The shower was nice and the bedroom conveniently warm with a very comfortable bed... There was a kitchen fully equipped at our service. I guess the kitchen and bathroom should have been a bit cleaner but it was not a big issue for us considering the cheap price we paid. I do believe Marvin's place is a good cost benefit for someone who needs just a place to crash somewhere downtown (like us). Besides that, there is a big Lidl supermarket and many other stores close to it.
I do recommend Marvin's for a simple and short stay.
Thanks Marvin