This is a well run Guesthouse in Haw Par Villa, however since it is an entirely commercial operation the listing you see may be significantly different from the room you will receive. This means even if the picture is of a nice spacious room you may be put in a small room.
However, do note that the staff are very friendly and helpful. Additionally there is a decent patio outside, but if you do not like being near smokers you will find it hard to use that space.
Lastly if you are thinking of staying for an extended period(ie not just doing touristy things), do note that the wifi is rather slow. All in all decent value for money!