There is another thread about the Gen 2 just up this page with more/better opinions...
I just got an Inforce WMLX Gen 2 (won it at a night shoot last night so I can be objective since it's free). This is my first Inforce light since I am a diehard Surefire guy.
So far, it looks good. Light weight and build quality is good. Made in the USA! It has lots of light at 800 lumens. But I prefer the tighter beam profile of my Surefire Scout (600 lumen). The Scout has more throw (better outside) while the WMLX has more spill making it better for close range.
I like how you can easily change the modes from momentary-on to "stay-on" with just a push of the switch. The exterior is plastic with metal inside.
It attached to my rails easily enough. We shall see if it flies off after some shooting. If it survives my 12GA, then I'll know it's solid.
If I could only have one light, I would keep my Surefire (M600u or M600v) due to the modularity and the numerous mounting options. But I think the WMLX will stay on my AR pistol for some testing and ringing out. And maybe take a trip on my shotgun to test the mount.