Having used a few different types of cone thread, I can say that this is my favorite.  I use this in my overlock machine and it makes a nice, stretchy stich.  I have not had any problems with broken thread from the cone as I have heard about from some other brands of cone thread.  The only possible downside of this product is that it's a little difficult to open.  The plastic that the cone is wrapped in is pretty tough (crinkly, hard plastic, not soft plastic like kitchen wrap).  And while it is perforated, it's kind of difficult to grab onto an edge to be able to peel it at the perforation.  And you don't want to use something sharp because you may break the thread.  The best solution I have found so far is to grab the edge with the tweezers for my overlock machine and pull until I can get the perforation to open.  Other than that, this is a really good overlock thread.