Not to rain on the parade but I found their service to be mediocre rather than their claims of "world-class customer service" which was posted on the bottom of all of their return emails. The first time I emailed them, they asked me to call them instead.
It took 3 separate emails from me to get an RMA# for my E1L which mysteriously stopped producing light for about 5 seconds when clicked on. I told them that "world-class customer service" would have had them send out a replacement head instead of me having to send the whole flashlight and wait 4-6 weeks for a replacement.
I've experienced "world-class customer service" before, but not from surefire.