I bought many flashlights in my lifetime and I'll likely get suckered into many more purchases in the future... :/ This one does look sexy, I'll say that, but to spend $329 on a flashlight is bat-shit crazy!
Key things you should look for: LED bulbs and a Lithium-Ion rechargeable battery built-in (USB recharge style preferably). Don't waste your time if it takes regular batteries, just not worth the hassle anymore. Usually the on/off buttons wear out for me or the battery compartment was not designed well, so you get weakened or no juice till you mess with the springs and contact points. Last flashlight I bought I modded it by soldering a Lithium-Ion battery to it from a retired cellphone. Works like it should, no more bullshit. When I need to recharge it, I bring it by the cellphone body which is plugged in, open the compartment and put the battery back in the phone for a normal recharge!
Sometimes stores have shitty Pay-Go cellphones on sale for $5 bucks, that's with power supply, cell and 3.7 - 4.1 Volt battery. That deal is worth it for the battery! I did the same thing to my cordless mouse. The triple AAA batteries it relied on sucked ballz in terms of drain so I soldered in a cellphone battery and keep the body to recharge it. Lasts a hell of a lot longer now and recharges quickly!