These are pretty much my favourite strings ever. Why? Because of the tone and because of the smoothness of the strings. The coating means I can move faster up and down the neck when playing barre chords (which I do a lot).
I play a lot so have to change strings quite often. It is a bit of a bummer when one snaps because I often end up changing the whole lot and that can get expensive. But on the whole, great tone, great feel, usually last loads longer than normal strings.