So,
Some are, some arent, if you put them on well they're fine, some of the cheaper ones are better, all of them are improved with correct setup (what isnt?), it all makes perfect sense.
No, really, it does. It just isnt as simple an answer as I was looking for :lol:
Cheers folks. I eagerly await the opportunity to play a suitable type of kahler installed and set up correctly on a suitable guitar :D