A fairly old hotel with old furnishings that has seen better days. However, if you are not picky about the interior, it is a reasonably comfortable stay here. Shower room is adequate, hairdryer and kettles are provided. We got the free breakfast which was simple but filling. The reception staff are friendly, and are able to communicate in English. Word of advice - try and get the non-smoking rooms - the tobacco odour of the smoking rooms may be rather unbearable for some. We stayed in the main building, and it was an overall pleasant stay for my elderly parents and I.
Transportation-wise, you may need to walk about 10 minutes to reach the nearest metro stations. There are some eateries nearby, though probably not as robust as downtown Shinjuku itself, which is about 15 minute's walk. There are plenty of convenient stores around the hotel - all within 5 minute's walk at most from the lobby.