I wish these would have a more slower turning ease. It is enough to touch the knob and they rotate immediately, and I find this a bit annoying, because I always have to check if the tone is not turned and sucking the... tone out of my pickup. Also, they are not so dirt proof, and within one year or so, you may expect cracks and pops when using the pot side. The switch also "clicks" when pulling it (not when pushing it back); I suppose it has to do with the speed of which I am handling it.
The PRO side, is that it is really indispensable if you want to split coils or want to add some other switching to your guitar.