[ticklemyelmo]

A roller-style rotary encoder would work better. And perhaps be a better ergnonomic fit for what I assume is its primary use case, scrolling.

[ThrowawayR2]

Having had a fair bit of difficulty keeping my mouse wheel clean, roller style controls would probably similarly accumulate crud. I'd rather have the knob.

[Rebelgecko]

I use the one on my Das Keyboard as a volume knob, it's pretty handy