Twin room is very small, but you have private bathroom. Good place to sleep well after long day sightseeing Tokyo. I haven't look for it long but there is probably no common space to read book or eat something.
Just simplest place to stay in Nairobi. There is free wi-fi (rather slow), restaurant, they can organize taxi to airport for 2000KES (Oct 2013) Opposite market where you can buy souvenirs. Supermarkers where you can pay credit cards are nearby. Rather expensive if I compare to Central European hostels in similar standard, however East Africa is rather expensive place for tourists. I didn't find anything cheaper where I wasn't worry about about
One toilet was a bit destructed, that made shower unpleasant.