Big banks aren't even convenient anymore. The vast majority of credit unions have partnered up into the Coop network. This means almost all CU ATMs and every 7 Eleven ATM around the US are fee free. If you add it up, Coop dwarfs the size of BofA's, Chase's, or Wells Fargo's ATM networks. Many of them offer shared branching too in case you need to physically go in.
