The question is always: For WHO is the rental agency good?
The landlord OR The tenant!
I have used Ba4uapartments some years back for renting out my apartment.
That was the most horrible you can ever imagine, (For me, the landlord, owner of the condo)
But for the tenant it was probably very ok!!!!!!!
The agencies focus a lot to attracting the tourist and have them to rent from them.......which means giving totally stupid deals and accepting the worst Britney Spears mentality from the tenants, ("its to noisy, its to dark, to much smog" etc etc.)
They do this because most ownerrs of condos dont have a lot of choice and do not live in the country to take care of it themself.
So my advise, be very carefull with selecting an agency!!!!!!!!