Yes i have used it Bubba and i was not that satisfied with how it generated seamless textures

it produces blocks and visible seams between the small tiles when it shuffles around the parts of the textures to produce a seamless map. I nagged about the problem to Lux when they first release came out but it seems they didn't fix it for ImageSynth 2. That's why i went for PixPlant instead as it can produce much better seamless maps even from crappy looking sourceimages. Even if those sourceimages are in a perspective.
Some UI screenshots i just grabbed from PixPlant 2.0 to show the creation of a seamless texture and all it's maps. Click them to view fullres.
This is the photo i found on Google Images and used as a source for the texture generation.
http://stonewall.nist.gov/CONTENT/wall199c.jpg
And a testrender with Maxwell

using the texture i extracted and generated in the above images.
/ Max