I signed with Mr. Ashlock in May, where he would represent our graphic novel, The Chronic Argonauts. However, circumstances have led me to terminate that contract only a few short months later.
After the contract was signed, I sent him a bunch of materials (preview copies, etc.) to help him in pitching the novel to publishers. He seemed very enthusiastic, so I was very happy. After a couple of months, I emailed him a few times asking if there was any update that I could pass along to my team, never receiving any update on his progress.
I did receive a couple of responses, however; once when I let him know that I was being interviewed for an issue of WIRED magazine (which was just released on newsstands!), and a very negative note when I sent him a Twitter message asking if he was getting my emails. I am very respectful of a person's time, especially if that person is out there trying to make me money. So I don't expect immediate responses to my emails. But Mr. Ashlock spends a decent amount of time on Twitter, so I find it very hard to believe that he is too busy to just send a quick note about news (positive, negative, or lack thereof) that he may have.
After seeking out the advice of others in the industry, I decided to terminate the contract. As others have stated, "It's better to have no agent than to have a poor agent." The 30-day termination notification period just ended, so I have not signed with another agent yet. Keeping my fingers crossed though.
Others have been successful with Mr. Ashlock, so I do not want to discourage you from querying him. I just thought I should let everyone know about the experience that I had so that you could keep it in mind should you be thinking about signing a contract with him.