I've used Networkesl "Chris Johnson" a few times and they helped me out once with finding a Uni job, but since then were hopeless at finding me what I wanted. I received offers from other companies that they must have swapped my data with.
Another recruiter was quite nasty to me on Skype after I refused several of his jobs. I think it was eslacross asia or something similar.
Aston's recruiter was hopeless too as the reference contact they gave me was too long gone from the school they offered to me. Recruiters really are sharks in China. They will say anything to get you there.