How about some first hand information?
I have a contract through Rishworth and have no complaints. I have also been to AKL to visit their headquarters. Any issues I have had in that past were dealt with in a timely manner and to my satisfaction. Bank deposits are carried out exactely as per my instructions.
Is PARC a good company? Don't know...never worked with them. They do not deal with all of the airlines currently hiring contract flight crew.
Do some research and find an agency that is right for you.
bd