Last year I received two of the L2L connectors and used them for most of the summer. I fish mostly warm water for panfish. I had no problems casting and thought that they turned over very nicely. And, I had on problem with it passing through the guides on my rod. Oh the ones I was sent were 3x. I also liked the orange connector in that it was like having a built strike indicator. I used it primarily on my 6wt rod and used that same leader set up on trip to YNP in late August to fish hoppers. If you change leaders allot, it is not for you. If you fish with the same leader I would recommend it. Even though I was sent a 3x because that was what I requested, I wound up tying 4x and 5x tippets without any problem.
Hope this helps.
" If a man is truly blessed, he returns home from fishing to the best catch of his life." Christopher Armour