Staying with Robin was amazing! It was my third trip to New York and I wanted to feel what it's like to be a local in the city, so it was exactly what Robin's apartment provided to me. I stayed there for 3 weeks and felt like I was living there for years!
Everything was as described and even better, but make sure you read all instructions and notes from Robin. All people living at the apartment was nice and helpful, including other guests. The apartment is indeed 2 blocks from J train which makes it super easy to commute. Personally, I think that the experience like that is why Airbnb was created: the chance to feel at home, explore the city in a way tourists can't and meet brilliant people.
One more thing, I didn't get to sleep on a loft bed, mainly because there is no socket there, and I like to have my phone near me, charging during the night (bad habit, I know), but there was an option with a futon at the floor which was ok to me.
Overall, my best experience with AirBnB yet! Thanks, Robin!