Hello. Dh and I work in London and commute from chalkwell. We both love the C2C and much prefer it to Abelio Anglia, especially the air conditioned trains in the summer :>) Not to mention it is cheaper.
I work in Covent Garden so walk to bank and take the central line to carry on to Holborn. My Dh works an 8 minute walk from Fenchurch street.
The best thing is arriving at chalkwell and looking out onto the sea, especially when the tide is in
My DH never has a problem getting a seat, and he works traditional hours. I work shift patterns and never have a problem either and don't mind the extra stops on the off peak services.
Definitely get more house for your pound down here...