Unfortunately my experience was bad, I chose my spot, paid for it and when I arrived it was full, the guy in there just kicked me out the parking lot, and said I had to apply for a refund, which I did, customer is very good and they promptly tried to help me and issued a refund, thats the reason of my second star.
The thing is, they said to me that in case of a full parking lot i could call them for reallocation, this seems nice in theory, but in real life thats a nightmare. It is you trying to call them, while a guy kicks you out from his parking and cars honking behind you, and you have nowhere else to park.
So as advertised that you GUARANTEE your parking by paying in advance is a lie, you don’t guarantee anything, it’s a shot in the dark and if you fail to park, you will be screwed to find someplace else, because you will be unable to search on spot hero or call anyone because you will have to be driving.
Bottomline: you are best trying to find street parking for free by the residential areas of NYC, it’s hard but you don't have to go through this nightmare that I did.