YK is a great host. He is very responsive to questions and concerns, and is willing to give suggestions for tours. The apartment was very clean, and was comfortable for the 5 adults in our family. The water heater took a few adjustments in order to insure everyone got a warm shower, but once we figured it out it was fine. The air conditioning worked really well which was good, because it was very warm the week we were there. The apartment is in a quiet location, but within walking distance of the Ueno Station (even with suitcases it wasn't a bad walk). There are a couple places nearby where you can pick up groceries or paper products. Would definitely recommend this apartment for a stay in Tokyo.