Actually, in my personal opinion, paying for USD35 for each sector, totally around USD70 for a roundtrip is not a good deal, considering that the full service airlines are now charging cheap promotional tickets from SIN-BKK with meals, inflight service and assigned seats.
SAS: S$134
THAI Airways: S$145
Garada Indonesia: S$148
The only setback is that most promotional fare require 2 persons to travel together.