I stayed at ST Signature, Jalan Bazar, for two nights in a room with a private bathroom.
The facility was modern, clean and pleasant. There is a common lobby with a WiFi facility and a shared kitchen area with essential equipment if you want to use it.
When you arrive, there is an online check-in process through a mobile app, and a digital room key is given to your phone. This checking process takes a few minutes, and all the instructions are available in the lobby. When you return to your room, ensure your phone has battery power to enter the room :). I faced a battery-dead situation one night. The staff verified my identity and opened the door for me.
The room and the bathroom are small but sufficient for business travel. The room has a queen-size bed, a work desk and a chair, a luggage storage area, a mini bar and a safety deposit box. The bathroom is clean. One thing that I felt missing was a cloth hanger on the room wall.
The location was very convenient. It's about 20 mins from the airport in a Taxi. Jalan Bazar MRT Station Entrance is just opposite the road. The area is easily accessible through other modes of transportation as well.
The checkout time was noon. I checked out, left the bags at the location, and went out for work until my flight time came. Then came back in the evening and collected the luggage before going to the airport. You can even take a quick shower and get a change in the shared bathroom area before you leave for your comfortable journey to your next destination.
For sure, I'm going to stay at ST Signature again on my next trip to Singapore.