They're fast at responding to emails - I have had some problems with them but it's because my account wasn't setup correctly (which isn;t their fault) so once that was sorted everything has been fine! The best thing about A-DDR though are they keep you up updated throughout what needs doing/changing etc., when other companies just get back in touch then ask "so did your change go through?" This helps stop all those issues we used not getting things done properly or having people waiting around forever before anything gets moving!! Not really any complaints from me yet as this place seem great compared to others out there who haven't worked together well enough haha :).