Marc's apartment is a fine option when staying in the Bklyn & NYC area. Its proximity to the park and the subway is ideal and the building itself is relatively quiet, safe, and clean. He has done a nice job decorating which offers a friendly and enjoyable aesthetic.
The kitchen is well stocked with cooking tools, and the bathroom is newer and was quite clean and pleasant. Also, the entertainment center was a nice bonus on the rainy day we were visiting, providing streaming media on a big screen.
We did not have any communication with Marc beyond receiving impersonal and pre-formatted messages regarding check-in and check-out which were accurate and thorough. However, there wasn't the promised 'How it Works' or 'House Guide' in the apt when we arrived so we were unsure of how to interact with the space. This meant we were walking on eggshells a little bit: afraid of disturbing personal items and not knowing what we could use in the space.
FYI - the sound of the local subway line mentioned above is quite noticeable in the apt-even more so if the windows are open. Its not overwhelming nor do the trains shake the building but its definitely a feature of environment. Even sleeping with earplugs, I could hear the trains most of the night. That said, I am a light sleeper. So, if you are too, bring your earplugs.
Also, you will be required to do some light clean up (stripping bed, collecting towels, empty trash cans/recycling, dishes, etc) which isn't much to ask. However, that isn't clear in the listing so this is a heads-up for those who would prefer to not have to do chores before checking out.
Generally speaking, its a fine place to rest one's head.