Well 5 trips now and and it works perfectly. Last weekend on the meramec in current again and it was hot out. We stayed on it for 4 hours. No problems.
Yesterday 4 hours fishing in the wind = no problem again.
I will say one thing. If you hit the spot lock feature while you're moving at a pretty good clip it doesn't work as well. It wants to get back to where you hit the button. It would almost be better if when you hit the button it would slow you to a stop and stay there. But hey overall I love it. Hook a fish, hit the button. Need to tie on a new bait, hit the button. Need a coffee, hit the button.