Revision hooked me up with a pair of these goggles at shotshow. I haven't made it to a base trip yet, but I have been wearing them off and on and I did send a coworker with them to a SFAUC trip. He was quite happy with them and did not fog despite near freezing weather. My impressions so far: These are a great size delivering protection with as much field of view possible. Kit comes with carry bag that has a pocket for a spare lens, in this case the tinted one and a cover sock was also included. The Desert Locust is one of the easiest goggles to change lenses out of.

Just pull up on the frame and the rest is easy. I worry it may be too easy and perhaps the frame can start to become un-attached on accident, but I have had no issues yet. Just in case you didn't know, most lens changing on goggles is balls hard. The strap detatch is also fairly easy and can be done by twisting the end piece away from the frame. Re-attaching is a little harder, but nothing dramatic. The seal against the face is just a rubber-like material, but still comfortable. The nose area does not push in on my nostrils at all like the Flakjaks do a little due to its padding. The Desert Locusts fit great with a MICH and just barely touch the rifle when aiming with a fully collapsed M4. I can get a nice sight picture without feeling the goggles fighting against the rifle to get my face where it needs to be. Although these are not made to wear with glasses, prescription inserts are available. I hope to update with a vicious fog test soon. The DLs have anti fog coating and foam covered vents, but thermal lenses are not available yet. Check out the revision site for all the detailed technical specs:
http://www.revisionmilitary.com/locust.html

*UPDATE: I was able to recently do a quick fog test of my own. As expected, 1 balaclava on a cool day plus a 1 mile run, = a good batch of fog. I do however feel the same would occur with ESS profile goggles.