Great spot. Deep enough in the residential zone to be very quiet, but still close enough to central Shimo and several stations to be accessible. Fun local bars. Only potential issue is the walls seem pretty thin; you can sometimes hear neighbors moving around and coughing. Something to bear in mind if you're needing to do phonecalls or late night showers.
Stayed around Shimokitazawa several times now and this was my best experience. Would stay again!