As a family group, including 5yr old kid and 70 yr old mother, we had to use a taxi to Shinjuku station. Transferring to a "New Keio line" wasn't easy to a foreigner so personally I can't say the location was good.
I like the big living room but the house doesn't have a sink in the shower room so you had to use a sink in the kitchen :(
All the bedrooms are located in the 2nd floor, and the bathroom is in the 1st floor, so if you are travelling with the elderly, you might want to reconsider.
Check-in instruction was smooth and easy to follow but it is a bit hard to find the house during the night. I recommend to check in before sunset.