Does anybody have any experience w/these guys? I saw an add in Shotgun News for them and was intrigued by the prices, but am also weary since they're so cheap in comparison to other stuff out there. I was looking at the LF1 Tactical Model: 300 Lumens w/strobe mode for $49.95. Considerably lower than the $139 I was initially planning on for Surefire Z2S model which is only 160 lumens. Any input you guys might have would be appreciated!