Beacon still makes me feel "meh". It was ok, but I never felt it was worth the extra points I had to put into holy to get it. It felt clumsy and because holydins are crit wh**es, it was almost always a lot of mana to spend for a ton of over heal.

I almost always used it on myself, since no single person in my group ever needed enough healing to make it worthwhile on my tank {5mans}. In raiding {pre-wrath} there was always another healer there jumping the gun on heals, making my paladin underworked in general and beacon near useless. Putting it on myself meant never worrying about my own health so I could just work on everyone else.