I have used all kinds of threads through my experience in many types of projects, but have my favorites I stick to for generally embroidery and quilting (Floriani and Hemingworth). This was the first spool of Isacord I have tried after reading heavily on other cheaper brands of glow in the dark thread. I had read so many reviews of cheaper glow in the dark threads that either dont hold charge overtime or tend to break constantly during the embroidery process. I do feel like skill and machine come into play with regards to breakage of quality threads in general. Skill being the ability to recognize what tools work best with a thread: Like adapting your needle, stabilizer and even foot to your project material for efficiency and best results. I was working on a fun Halloween quilt with some glow in the dark features. I have a Pfaff Icon 2 which requires quality threads in general for the faster speed performance. Once I got this machine I instantly got rid of all my Amazon brands that worked well on my old machine, I could tell they just werent up to the performance of this machine. When I was looking at glow in the dark thread I wanted longevity and something that could keep up with my machine. This stuff is pricey, BUT 100% worth it in every way. The amazon brands DONT hold instant charge and dont have much recharge longevity for glow. This ISACORD Texlight glow thread is SEW much brighter, lol. When you flash charge with an LED light, even for just a few seconds and then turn the light out it puts out a very bright glow. Even after the 3rd season using this quilt. And this thread sews with minimal breakage. It is more coarse feeling than embroidery thread, naturally, but its nothing like the nightmares you read about with glow in the dark threads from Amazon. It works well with heavy embroidery (and glows even more). It also sews decorative and straight stiches pretty well. You will get some minimal breakage, but use a full and tightly wound bobbin along with a slightly larger eyelet needle (I generally use 11 on cotton with embroidery thread and here I used 14). You can try a thread net or slightly decreasing tension as well if your machine likes that, but i didn't find either necessary for my situation. It really depends on your machine and tensioner smoothness and if you have automatic tensioning or not. Ill definitely grab another spool of this once I finish off this spool. Loved it so much i even picked up some emboridery thread from Isacord at my local shop and really glad I discovered it, its a nice thread with some vivid color options. Im thankful I have my threads electronically saved so I dont end up with multiple spools fo the same colors. I know most other hobbiest with huge thread lines tend to only stick to one brand for the ease of not dealing with crossover, but with technology software these days of color match converters and app lists, it just adds to the fun when you see a color you have to have but your brand isnt quiet as vivid in that given color. Im definitely adding Isacord to my favs!