Probably a bit late to reply now but I have used Cheshire Companions for years. I have had the odd miss fit with them but the vast majority of the time the receptionists, who know what I like and don't like, will get it right for me. If they have nobody suitable for me that night they will say so. You also get to speak to the girl on the phone before agreeing the booking to at least get a first impression, which is useful.
My only gripe is the lack of facial pictures. I understand the need for security, especially on the main website and the risk of them getting into the wrong hands but having used the agency for a good 15 years and knowing the owners well, they still won't send me face pics to assist in my selection.
Other than that they are always my agency of choice for Manchester.