As a landlord I'd suggest looking at Friday Ad and Gumtree. The only tenants I got through a letting agency trashed a flat. The idea that the tenant has to pay those fees to a letting agent is a pure and utter rip off. It's the landlord that should pay them if they are stupid enough to use a LA.
The problem is that many agents get bored about a property if they don's sell it quickly. I has my house on with Mishon Mackay a few years ago. Got a few viewings in the first 3 weeks or so but then it went quiet. I was suspicious so asked my Dad to go in pretending to be looking to buy and...