Have tried most agencies for my frank properties inc mpre, hocking stuart, andrew milne, buxton for prop mgt..
my assessment is that they are all as good / bad as each other. The renting demographic is the icing on the cake.
Having said that, it has never been enough of a problem to put me off an area/ investing. It needs to be managed on an ongoing basis, sometimes micro management.
No point sweating about it if the long term goal is to harvest the equity. Make sure there is landlord / loss of rent insurance for all ip's
Harris