At 10% to manage my flat Robert Stanford have more than earned their money in over five years of service. Taymount Grange is a lovely art-deco block in Forest Hill with some true characters in residence. Fortunately the guys at RS made sure that my tenants were never among the bat-shit crazy type that makes up 20% of the inmates there - always carefully vetting people and finding good honest folk to rent out my flat to.
They not only found tenants and collected rent, but they managed the place full time, bothering me when needed (yikes a flood from an upstairs crazy emptying her washing machine on the floor), not bothering me when they could just go fix it (broken toilet float). They managed flood-based redecorations, pacified tenants during the interminable block renovations (thanks, Freshwaters, for many grey hairs) and all-in-all did an outstanding job.
I can wholeheartedly recommend Robert Standford for letting out your property - Sophie is especially charming and efficient as a property manager.