I've been using this for the last week now and its become a valuable part of my mod collection. Having it bound to my mouse wheel toggle left/right or mouse programed buttons makes a huge difference. I often assign raid icons just so I can easily identify targets and this make it so much quicker. I'm using it for potions and main-only spells. I also use it for /RPC commands, such as making the group dance, bow etc...

The only minor annoyence I have is the opacity of the icons. I'd like them a little more solid when not hovered over and when hovered over.