I've been running into the same issues. I'm planning on moving away from Simple soon. Not being able to deposit a check without mailing it in (no mobile app for Windows Phone, a problem most of their customers won't have), nor deposit cash, nor write checks (even e-checks). There are just too many limits on what I can do.
Now I have to find a bank that can do all of that, but doesn't have even worse issues.
Now I have to find a bank that can do all of that, but doesn't have even worse issues.