The other good thing is there are hundreds of freebie tiles for it, all saved in the correct format if you search Fabricator at Share Cg.
As everyone says, it’s a 2-click solution for retexturing clothing. First you apply a diffuse pattern, and then you add a “weave” which comprises bump, displacement, gloss and spec settings that can make your chosen fabric render as though it is everything from a chunky knit or canvas to satin, chiffon or organza. (There are dozens of weaves.
Many, many people use it and I have yet to hear a single complaint.
There are two more products that work in the same way: The Lacemaker and MachPack. The former uses displacement and transparency to create different kinds of lace and the latter is packed with masculine-orientated fabrics and textures.