(I stayed 17 nights here, just myself)
Pros: It's a fairly large spot for NYC in one of the best areas in my opinion. Although I was alone, with two beds you can easily fit a few people in here if you had to (although there's only one room, the other bed is in the living room and won't have any privacy). The street it's on is right next to some great eats, including a nice, large bodega in case you needed to grab any supplies or food/drinks or a delicious sandwich.
Cons: Ultimately you're paying what would normally be 5 star hotel rates in other world-class cities for a room that is in a quite old, pre-war building, but this isn't unique to Max's place. It's a one-story walk-up due to no elevator, which I imagine might be a dealbreaker for those who have limited mobility. While there was thankfully no street noise to be heard from the bedrooms, the sound insulation within the building is below-average as I often heard a crying baby in the mornings and people slamming their apartment doors. Sunlight is also limited in the bedroom but decent in the living room, although you're flanked by buildings so don't expect a view. Neighbors or people in adjacent buildings host parties every weekend but they finished at a reasonable time.
Some people might be turned off by the lack of TV. The shower and sink knobs could use some work, as the shower was hard to modulate temperature and lacked water pressure, meanwhile the cold water knob in the sink only goes full blast or nothing. The toilet is also surprisingly small, and I'm not a big guy.
One day, the internet broke and that was frustrating as a visitor because it's hard to self-diagnose (I'm in IT and this would normally have been a cinch). After 24 hours of it being down, I contacted Max who graciously had it handled with the ISP.
Overall, Max tries their best to be helpful, although was limited due to the fact that they were in Europe so there was a time zone difference. The major cons mostly have to do with the quality of the building. For the cost, it probably was not the best value, but it's also in part understandable that in New York City, everything is just really expensive. For a few night stay in a great NYC location, this might be a good spot especially if you wanted to fit some more people.