I stayed at Rob&Elle private room with my mum for only one night. And I agree with most what have been already said. The hosts are very welcoming and everything is thought to the detail to make the guests comfortable. A lot of information and maps available for free.
The room is completely private, you have everything you need in it, and even some food for your breakfasts or a night hunger :)
The location and all descriptions are accurate. You are in a very safe area with nice neighborhood.

And the view from the boat is absolutely breathtaking!

The only disadvantage for our short stay with a lot of heavy luggage was the time it took to get to / from Manhattan, airport etc. We were very tired but it shouldn't be a problem for longer stays.
I recommend you to stay here.