I have not used the agency, Maid Guru but you can do a quick search on https://services.mom.gov.sg/eadirectory/ to find out more about this agency. It seems that it is a relatively new agency (of about 7 months) and has a high placement volume of FDWs. Similarly, you could search for other agencies and find out about the agency's service quality and performance. Maybe you could give them a call and perhaps, have a better 'feel' of them? That is what I would do :)
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It surely seems relatively new but as per the FB votings and reviews looks like worth a try!
thanks