Our stay at Marton's was OK. We never met him but he was available to answer our questions when needed.
It was cheap and close to the main train station, the metro and to the city center (there is a citybike station quite close).
But the room itself was not the best. Not very practical (bed quite high with no button for the light for example, no place to put our stuff). There was only one pillow for us (we were two), no towels. It is a student flats which is pretty cool as his flatmate is very nice but can be quite loud in the night.
It was nice that we could arrive when we wanted, but we had to pickup the keys in a hostel situated at about 1 km.
If you need just a place to sleep it is OK.