I stayed at Umut's place for three nights and it was a best decision.
Umut, his brother Nazim and especially his mother all are so courteous that you don't feel you are staying with someone you don't know. It's like home away home. His mother always greeted me like her son.
The room is same as shown in the photographs. It is simple yet it has all basic necessities. The room has a separate pedestal fan and a balcony for proper ventilation. The bathroom was always clean.
The location of the house is brilliant. Very close to bus stations, Ulubalti Metro Station and many cafes and restaurants. Other tourist spots like Taksim, Grand Bazaar, Blue Mosque all are in the proximity of few Kilometers.
I would definitely recommend this place for a single traveller or a couple.