I've used it a couple of times, and it seems okay so far.
I got only two kinds of yarn. The first is this ginormous skein of 70% merino/30% nylon yarn from Newton's Yarn Country.
I've never heard of that brand, and the yarn is labeled as "generic superwash merino". The company is really a yarn wholesaler and their yarns are usually re-packaged and re-labeled by other yarn companies who sell it on the retail market. The yarn looks black in the photo, but it's really a very dark purple made with a twisting of very dark blue and dark red fibers. My other purchase was 14 skeins of washable merino from Fibranatura.
I didn't know if photos were generally allowed, but at the Lion Brand Yarns booth, I got permission to take a photo of "yarn man" sitting on a yarn covered chair.