I am so satisfied with my Kinnaird evo reeds, that I decided to get a set of the new edge drone reeds for my other pipes, which are McCallum. NO sacrifice in tone at all when set up easy, as opposed to other reeds from moving the bridle.
However, it can be quite tricky to set up properly, a ton of patience is required, the tenor reeds were easy enough, but the bass drone requires LOTS of adjusting, as it was quite temperamental and would only howl and nothing else depending on the adjustment, atleast in my McCallum drones.
So, if you are a beginner like me, I suggest you get your teacher/instructor to help with your setup and adjusting, again these reeds require much more patience to set up then conventional reeds in my experience.
The great tone, and efficient setup is DEFINITELY worth it though! And so I give it a 5/5! Fantastic product :-)