Going through an agent doesn't guarantee it's hassle free, and putting a sensibly worded ad on Gumtree is usually a better option.
i agree however if you do not live in Poland it is quite hard to let potential tenants visit the place, you need to ask your local friends and it is just embarrassing.
What i also find strange is that management companies I talked to decided what the rent should be, offer to pay you the rent directly instead of the tenants doing it, i would prefer that they just deal with finding a suitable tenant, making them sign the tenancy agreement under the owner's name and not the agency's name, deal with the documents , send you the czynsz etc get 10% commission on the year rent and that's it.
i mean let the tenants pay you .
Anyway I did not fully understand this kind of organisation.