first off: i have carried a Inova X03 for almost 6 months (Inova X5 before that)--i carry it everyday; its a tad longer and heavier than the surefire G2 i have on my AR (the beam is consentraed like a spotlight, not a flood like the surefire G2)
second: i will no longer carry Surefire (or anyother bulbed light); i got a NEW G2 just a couple of months ago to carry around, but then one night 2 weeks ago (hardly used, NOT banged around), i turned it on, trying to check under my truck, and the bulb just blew out on me
i did EM surefire and they offered to send me a replacement bulb; although they have great customer service, a great reputation, i cant have a flashlight go out on me like that again
from now on its LEDs for me, and surefire, with thier super-expensive LEDs are not an option (the INOVA XO3 cost me $52 online), and although thier G2 is great for the money, i will not be carrying bulbed lights anymore, so that cuts surefire out for me (until they get LEDs out for cheaper)