I am going on a 17 day Mt. Everest trek...
I am going on a 17 day Mt. Everest trek in the Spring of 2013, hiking from Lukla to Everest Base Camp & Kala Patthar, then back. Will this boot perform well on that trek, or would another 'La Sportiva' style be better? This will be my first experience buying "professional" grade hiking footwear. Thank you.
The WLF is specifically designed for backcountry fire fighters.
Take a look at the regular Glacier - http://www.backcountry.com/la-sportiva-glacier-mountaineering-boot-mens
Also, check out the Makalus for step-in crampon compatibility and the Karakorams.
I did the same trek last September/October in light hiking boots (Merrel Moab Ventilator Mid), carrying a 35 lb pack. My buddy did the same, and I saw a couple with the same shoes. Very doable. Those would be similar to La Sportiva's FC Eco 4 or the Thunder II. Of course, there are also tour groups full of people with mountaineering boots too.
It comes down to how comfortable you want to be and how much you want to spend. As long as it's a mid height boot you probably can't go wrong.
It's just a vigorous hike. And the Sherpas often wear Crocs or Chinese sneakers.