Ivan and his team are great. I used their services to rent out my flat for several years. They were very professional, always quick to resolve things, and went above and beyond to help. Indeed, they made the whole experience painless (e.g. billing, finding tenants, check-in and check-outs). I would highly recommend them.
We bought our house from these agents. Very friendly and efficient. I don't know how much they cost, but they are good. The footfall outside isn't great, so you might not get so many people looking at your house through the window, but everyone looks online these days. For some weird reason, they don't have the prices of the houses in the window.