We have been living at 3JSQ Apartment for last 3+ years. Not once we had any negative experience. All office and concierge staffs are prompt and professional with their responses to any issue and that's if we had any. Maintenance team is amazing, they go extra miles to assist you which is rare these days. Building is also kept very clean all the time, I see cleaning service done at the lobby, hallway and trash chute daily.
JSQ PATH is literally 2 minutes walk which was one of the first reason we chose this property since I work in lower Manhattan (this made my commute about 20min which is nice)
I'd say only down side is that there aren't much to do in the neighborhood but Grove st, Exchange place, Newport, Hoboken, WTC are one or few stops away. You also can hear train noises louder in lower units (we have lived in few different units) but it eventually become like white noises as you adjust.
Overall, we are very pleased with our time here and would recommend to anyone.