I can't believe I lived here for five years before visiting this little museum in my neighborhood. Turns out it's really great. It's an old house that has been maintained/restored. From the moment I walked in the front door, I felt like I was in a small town museum - I was personally welcomed by a docent and given a binder with a self-guided tour inside and instructions on where to go to start the tour. The binder was very thorough and filled with interesting information. Allow two hours to absorb everything and get a good look around. Then the docent was available for questions afterwards. I happened to visit Merchant's House a few weeks after I went on the Gracie Mansion tour. Both houses are restored to about the same time period and the tours complemented each other well. I recommend visiting the Merchants House for a glimpse into old school, wealthy New York.