i just need to add my opinion here
I've been flying for only a year now, and if it wasn't for the simulator I guarantee you I would not be able to do chaos, funnels, inverted autos etc. etc. At least not after a year of flying! Co-pilot is a nice little device which should be used if necessary, just like the gyro is a nice little device that should be used if necessary, Now I personally know pilots that don't even use that, I don't agree with that but respect it