Healers would disagree. Even though it says 5% bonus. The game has it at 10% aka a healing circle jerk will go form a 1000 to 1100 obviously not 5%.
If that isn't worth while to have for two minutes I don't know what is.
Then I don't think healers know what they're talking about lol. In fps it's work able, in a couple of fights in raids (mostly trash) It's work able. Beyond that it's useless. *
*Not entirely useless...just...ugh. Really? a 5% heal increase that healers won't / can't stay in, or a 5% increase to self heals...that YOU can't stay in all the time...it's a really long cast cool down, that's about it. Give me sabre reflect any day.