(Review written by, and submitted on behalf of, my wife for whom the stay was a birthday present) Ronnie's place is in an excellent location on the upper west side; the 1 train is a minute's walk away, and the B and C a couple of blocks away on Central Park West. The area felt very safe, even walking around at night as a sole female. The room itself is warm and cosy, with a comfortable bed and a table for working or eating a snack.
If you're coming in from LaGuardia, the efficient M60 bus takes you to 106th, about 5 minutes' walk away.
Ronnie is very friendly and accommodating. Check-in was easy, and sharing the bathroom presented no problems at all. Ronnie's son Adrian might be around for a chat or to harmonise on a hearty rendition of Happy Birthday! Thank you for making me so welcome.
In the immediate vicinity, I would recommend Broadway Bagel (about 2 mins walk) or Broadway Restaurant, which doesn't look much from the outside, but was cheap, friendly and provided a decent breakfast.
Central Park is walking distance away, as is Columbia University (beautiful campus) and Riverside Park.
All in all, a great place to stay if you're travelling alone. I'd return in a heartbeat. Thanks, Ronnie.