So far Merchants Bank has been good to me. The staff of the place I visited were very friendly and helped me set up a bank acount with them with almost no paperwork required. Also transactions with them so far have been quick and easy.
I've only started recently so I haven't had much experience with them; the problems I've had so far are the super high currency conversion rate that they charge when I get my overseas salary converted into RMB, and that I have to do the conversion manually each month by visiting the bank. (It's remitted into my account but it stays as yen. I don't know if there's a way to automatically have it converted or if I can do it online.)