We absolutely loved this space for our recent wedding. We didn't have that long between when we got engaged and married, and we're living on the West Coast and knew we wanted to ge...t married on the East Coast where most of my family is, so my mom saw a few venues for us (once we'd narrowed it down to three through emailing and searching through websites), and Facetimed me to show me the venues. This was certainly on the more expensive side (considering once you bring in all the outside vendors), but it is a phenomenal space. April was my contact from the first email I sent, and she was always extremely responsive and professional to deal with.
After my mom toured the three venues, we knew we didn't want a traditional large wedding hall/hotel site. The Pratt House had so much class and character and was located in a beautiful location on the Upper East Side (also ended up being great for outside of Pratt House wedding photos). The nice thing about the venue (especially for us coming from the West Coast), is that we didn't need to plan a lot of other decorations other than flowers, as Pratt House is already beautiful in its own right. With Pratt House, it's a progressive venue - so ceremony is in one room, cocktails flow out of that room, dinner is served upstairs in the ballroom and we used the library adjacent to the ballroom for our buffet. Dessert and dancing were back in the downstairs rooms. The staircase is gorgeous, but there are also functioning elevators if need be. I would say, Pratt House says you can have a max of 130 guests - we had 112 and it felt very tight. I can't imagine how they would have fit 130. Not a knock against them, as we knew the layout going into it, but as our event was running a bit behind, dancing got a very limited amount of time. If the dance floor were in the middle of the dining tables, as it is at many wedding venues, this wouldn't have been an issue, as we could have started some dancing during the buffet. Again, that's not against them, but something to think of when planning your event and working with your caterer on timing.
When you book at the Pratt House, they give you a file with a list of recommended vendors who know their space. While these vendors are not all the cheapest in the city, it's nice to go with them, as they know the space and what they are and aren't allowed to do in it. They also understand the "upstairs/downstairs" dynamic the event has. I'd highly recommend using their vendors.
Overall, I'd definitely use the space again. It's in the heart of Manhattan and few places I've been to have more charm and elegance.