I am usually anal about getting there early, why not enjoy the lounge and relax a bit.
I have never missed a flight, although the closest I have come is 3 times in Frankfurt airport. Mainly due to local guys I work with underestimating the traffic to the airport on a Friday afternoon.
One of these times I was actually able to get to the gate as they were giving my seat to a standby passenger... fortunately they let me go.