I stayed with Pat for 3 weeks in June. Pat was a great Host. Friendly, easy to talk to and accommodating to your needs.
His place is in an excellent location, and like the ad suggests, he is not home all the time and when he is, gives you your space. The room and air conditioning were great. The bed does have an old futon style mattress and isn't that comfortable for long stay, but considering price and location, couldn't really ask for much better, and wouldn't really affect those for short term stay.
Room has own lock and key which I was provided with, and building was very safe and secure, with two locked front doors at entrance and friendly neighbours. Neighbourhood is quiet and well located near restaurants, grocery stores and many different public transport routes making it very easy to get around.
I had my sister stay in the room with me over one of the weekends which Pat was more than happy to accommodate.
I had use of the kitchen and shared the bathroom with the other room as ad indicated, but never had any issues with it being available when I needed it.
The 5 floor walk up was exactly as described. I had a large suitcase and managed to get it up and down the stairs myself with no issues, and you do get used to them. I am extremely unfit, but didn't find them an issue and they actually added to the experience of being in NY.
Overall, my 3 week stay with Pat was very pleasant and I would definitely recommend his place.