Nonetheless, if a single pilot is "over relying" on the auto-pilot, he/she had better well know all the modes very well, especially for engagement just after takeoff. Otherwise, the autopilot can fly into the water just as easily as a messed up job of hand flying.
Thats basically what I meant by:
However, the performance especially of the 3 & 4 means that it takes a lot of experience to stay ahead of your airplane IF something goes wrong.