Location wise this is a good place for getting around as it is close the 7 subway line, 46 St station. Sen was a good host and responsive. As advertised it is quite old and there have not been many upgrades over the years. The cooling, especially the AC, in the apartment is substandard so if you are visiting in the heat of the summer that has to be taken into account.
For cleanliness, the floors could have used a better cleaning for sure. With the age of the apartment it seems to leave the perception that the apartment is not as clean as it could be. Otherwise everything was functional and it was spacious enough. The neighborhood was quiet and seemed safe.
As a simple, no frills accommodations for a first time visitor to NYC it was fine.