Use it regularly. The 2.1a USB output charges our phones much faster than the car's built-in USB port also, and it functions even when the switch is off (no fan running, no noise). We use the outlet to power a DVD player and it works great.
I've used other power strips over the years. Some would not last. I came across TRIPP•LITE products online in '05 when I got a new Mac. And a $20k lifetime insurance to boot. Never had a problem with TRIPP•LITE.
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