I had two great stints at Glou during my visit in Japan. As many of the other reviews state, the rooms are very clean and really small. But all in all, the value for money is really good, keeping in mind the great location and Tokyo's super functional public transportation. Checking in and out was easy with the friendly staff. In general nothing to complain for this price range.
Few notes:
First, especially for men, as the rooms are tight, some of the beds are also fairly small / short in terms of length. As an average height male, I had my feet hanging free outside of the bed when sleeping. On cold nights this could bring some discomfort.
Second, the walls are paper thin – in and out. So for those who are noise sensitive, this might not be your first option or at least a set of ear plugs are recommended.