To start off, this unit is clean, we stayed comfortably for 3 nights. I would say the price is cheaper than the other units in Tokyo. This unit is convenient to a certain degree, very close to Iogi station around 2 minutes walk, note that the train line that runs to and from Iogi station is the Seibu Shinjuku Line, so not included in JR Pass or Metro Pass. To the closest changing train is Nakai Station (180 yen per trip for Toei Oedo Line if I'm not mistaken) or Takadanobaba Station (210 yen per trip for JR Line).
The unit is as big as could be expected, self check-in with clear instructions.
All in all, a good stay.