I have one of those. I bought it about 2 mos ago. To override the auto shutoff press the button on the right side of the 3 lower ones. Hold it down until you hear the beep. Then it will not shut off on you.
I think this iron does not get as hot as my Black and Decker (which died in 10 mos) It is a very heavy iron. Normally I like the heavier irons but I recently had shoulder surgery on my right shoulder (I'm right handed) so handeling this iron has been a little tough on me.