I wouldn’t say there’s anything bad about it per se, it’s just kinda frustrating to work with. Cut it off shorter than you probably would a normal thread type as this stuff loves to fray/unravel. It gets real poofy real quick when you’re stitching with it. I also found the stuff I was using to feel … odd. Almost like twine or something. Just kind of rough in texture. I was glad I didn’t have to use a lot of it, although there are a couple other patterns I’ve got my eye on that use it pretty cleverly. I would use it again, but only for a pattern I really love. Or if it was minimal in use. And there are apparently several different types. Some are more plastic-y in nature. Some may glow better than others. It’s just an odd duck.