I heard about this one night, grabbed it, ran a Sunwell trash pug and two hours later, I was almost completely converted (In the time since, I have come to love it wholeheartedly). It takes a lot of the guesswork out of many, many healing assignments I can think of, and lets you react faster to boot.
My only "complaint" is the same as Bolty's but it's not like it falsely advertises anything. =) It does what it's supposed to do, and the debuffs would only be a bonus. A very nice bonus, but a bonus nonetheless. I'm actually pretty lazy about curing anything except with Poison/Disease Cleansing Totem (which only works in your own subgroup-and you get an instant tick when you cast it, so I use it reactively which is kind of more proactive than laying it preventatively), or during Vashj P2 since I might be the only one in range and a lot of the time I'm not doing anything anyway.
My only "complaint" is the same as Bolty's but it's not like it falsely advertises anything. =) It does what it's supposed to do, and the debuffs would only be a bonus. A very nice bonus, but a bonus nonetheless. I'm actually pretty lazy about curing anything except with Poison/Disease Cleansing Totem (which only works in your own subgroup-and you get an instant tick when you cast it, so I use it reactively which is kind of more proactive than laying it preventatively), or during Vashj P2 since I might be the only one in range and a lot of the time I'm not doing anything anyway.