We use this line now been 3 years for our WestinWORKOUT® and are super happy. The line is stable, granted by the 7m a large space and the stop function also runs great. What about very important that the line unrolls quickly and not drag on the floor when my dog comes up to me rugerannt and possibly still inside implicated. Had so difficulties in earlier lines. One more reason why this line only is used. However, now after 3 years has everyday a new ago, (oddly always at the same place) aufribbelt by the constant stop function leash. While this applies only to the "substance" around it and not the stable main strand leash, but is optically course after all so beautiful! Nevertheless, 5 out of 5 stars !!!