I played with it for a few minutes. I often receive swatches or scans of fabric where the full pattern is not encompassed. I was able to get a fairly good result with this bitmap.
I like the Light and Color equalizer feature. Often photos or scans have uneven lighting. This is an easy way to correct it. I tried with some tweed-type fabrics downloaded from a furniture web site and except for the watermark all over it, it turned out very well.
I've added a sample of a tweed that I got from a fabric website. I think I had already worked the original over a bit, but it still tiles noticeably more than the pixpaint version.