Not personally but multiple Singapore-based friends have given me recommendations for MISA and swear by them. You might want to post a generic question on the Singapore subforum asking about people's experiences with MISA and also for any other SG-based reliable agents. Zuji.com.sg (travelocity subsidiary) I've never been impressed with. I know what you mean about the auto-grouping of options and no segment-by-segment selection ability, but that may just be MISA's functional website programming. If you want a different combo of flight segments, try using the phone number (if not in SG, can you Skype them?) and see if an agent can build the flights you want and come up with similar pricing.