Spartan, a very similar experience to yourself as I did a review of Bethany 17th February, which included the following transcript which was particularly annoying to myself as I am not from Gateshead/Newcastle and was actually early but couldn't find the turn or entrance to the apartments on Gateshead Quayside.
'No SatNav but could see where I wanted to be, or so I thought, twice in the Hilton car park ,call to Diamonds who only reiterated the address, panic beginning to set in. Building found, car abandoned, another call to Diamonds, now I have the flat number, but no answer from the intercom but was able to tailgate my entry into the building. Lift not working, Apartment door rung. What else could go wrong!!!'
I found the Agency useless in trying to assist me, and to keep repeating the address is no good to someone needing help in finding an apartment block, in fact it just infuriated me further so maybe the Agency staff (and not just at Diamonds) should have an understanding of where the ladies that they are representing, actually work from. It's not as if these locations change that much. Have just posted something on a thread about Chelsea and the fact I had to move from Dunston to Gateshead for a meet to compensate for one of their girls 'no show', the Agency again were pretty useless in helping me so I guess the answer is to invest in a SatNav.
Like your experience, Bethany was excellent, unaware of the clients problems again in getting to her apartment I at least on this occasion benefited from being her last meet of the day as she was able to ensure that I received the full duration of my meet and of course she provides such a fabulous service too. So like you I wasn't happy with the Agency, but had no complaints with the lady herself.