Matthew was nice, and the room and shower were great. A few downsides, though:
-Matthew hosted a party my first night there (I booked at the last minute). He had warned me this would happen, but I didn't realize it would be so loud right outside my door, or that it would go so late (I'm from LA, where most things wind down by 2am or so. This went much longer than that). This probably won't be an issue for most people, but I thought it was worth mentioning.
It's a nice neighborhood, and safe (there are a ton of NYPD cars around, since there's a station right there), but it was further than I expected.
-Matthew had rented out both rooms, so he slept on the couch & watched TV most nights. He did turn the sound on the TV off when I came home, which I appreciated, since the TV and my room shared a wall, but I wasn't expecting to be walking past him every time I left my room (i.e. to go to the bathroom or to leave the apartment).

Again, Matthew was a nice host, and the room was spacious (especially considering it's Manhattan), the internet was fast, and the shower was great (as advertised), those are just three things I wish I'd known before booking.