I rented a property through Belvoir for a number of years, and had nothing but positive experiences in my interactions with them (which were few and far between - they just let you get on with living in the place you're renting)! Never any fees when renewing tenancy agreement (unlike a LOT of other letting agents), and rent barely increased over the four years I was there. Belvoir (and in particular Gwen and Loretto) were easy to contact whenever anything needed to be maintained in the property, and upon leaving the deposit return was processed very quickly.