Sonia/Judith's apartment is wonderful: spacious, perfectly clean, warm and comfortable. Sonia and her sister are perfect hostess and the communication is clear and quick!
A little downside is the location that, although it's very close to the subway, this is quite far from Manhattan (almost 40mins to the first stop in the island); this could be a small disadvantage if you're visiting New York just for some days. Other then this we can surely recommend this flat :D