The Navico Autopilot
is the most important device on board. Reima has two of them, in case one should fail. The solo sailer has to rely on his autopilot for a fair amount of time - even if he is awake, it often pays to trim the sails yourself and let the pilot do the steering. It's faster to hold the spinnaker sheet in your hand instead of the tiller.
The Navico 300CX tiller pilot has proved the best and the most reliable of the lot.
Tiller Pilot 300CX