My 5-month pregnant wife and I stayed 8 nights here on holiday as we visited friends and toured around Singapore. To clarify, for those who may not have figured it out, this Zen Rooms accommodation is actually in the Porcelain Hotel, a fairly recently refurbished hotel in the heart of Chinatown, and only one block from the Chinatown MRT station, and only a 10-15 min walk to the Riverfront area. The location was perfect for our needs and purposes.
This necessarily isn't a hotel in which you want to hang out at all day, as there is not much of a lobby space for casual relaxation. Luckily, when we checked in, the hotel did upgrade our room for free, so we did have a bit more space than what we were expecting; but this is Asia--count on the rooms being on the smaller side.
All in all, I highly recommend this hotel; a great value.