We actually never met Grover. He has some nice 'Greeters' who do the check in for him. Ours was really nice. She didn't tell us about the check out time (I know it was in the papers but there was a lot and I accidently got confused with check in and check out time) so we had to pack very quick when the cleaning lady came and the manager (which also wasn't grover) told us on the phone, that they will charge us extra if we won't leave very quick or leave the luggage there for 2 more ours. She was still very nice though.
But still it was a nice stay, quiet big room for New York City and Shops, Restaurants and Subway in walking distance. We were not in the aparment a lot, but when we were there no one else was, so there was no one to talk to or ask any questions. So we had to use tissues the whole time cause there was no one to fill up the toiletpaper.
The streets are quiet loud and there was a lot working going on the house while we were there.
Still would recommend to stay there caus its a nice house, clean room and bathroom and close to all you need. Just we expected a little more chatting with the owner or other quests like we had the last time staying in New York with Air-BnB. But if you like to have some quality alone-time it's perfect for you ;)