It's very simple and intuitive to operate. The protections are much less complicated than the Bus for the driver.
-Overspeed. You can if you insist, but you can't trim out the control forces once you're in overspeed.
-Underspeed. Same as above and the autothrottle will wake up to save you unless you've turned off completely. Usual aural warnings.
-over bank protection. It takes increased pressure on the controls to overbank. If you ignore that, you can do it. It will talk to you though. This feature can be turned off on the MCP if you so desire. (never done in normal ops.)