This kind of property management company won’t do anything, they just bring you to see the property, get your application fee and handle the rental fee for the property owner. If you have any requests or fixes on the property, they will forward to the property owner and let the owner know, it is all up to the owner to do your request or not. They don’t give you any info about the owner. Also, this kind of company likes to bring several groups of renters to see the same property, get all application fees and let the owner to pick one of them. It is no guarantee the renter with highest credit scores can rent the property. It is up to the owner to pick, maybe the owner cares about the renter’s job type, age, race….
If the property management company owns a community of properties, that’s more trustable. You can get the apartment ranking from http://www.apartmentratings.com/ .