We stayed at Lei’s place for a week in Mar 2018. Location wise, it is only 1 train stop from Shinjuku or you may choose to walk 15 mins to Shinjuku (comfortably in spring weather). There are many Korean shops and restaurants on the main street located less than a minute from the house. Do take note if you are traveling with kids though - because the main street is insanely crowded most times of the day, traveling between the station and the house can be a hassle with young kids in tow.
On the house itself it is well equipped with a full kitchen, washing machine (the bathroom heater has a clothes drying function), looks exactly like the pictures and has a bonus of a massage chair. However cleanliness can be improved (when compared to typical Japanese standards) with dust accumulated at the corners and at the bathroom vents.