I ended up registering with this agent recently only because of the property I wanted to see. I was so reluctant to deal with them again having bought from them previously and being treated with contempt as a buyer, which is really how it was done this time!
The agents lie, ignore calls, ignore offers and basically choose how they want the sale to progress and ultimately they are exactly the type of agent who gave estate agents this bad name. They are underhand and cannot be trusted.
Steer clear and read all reviews from renters on other sites.