This is pretty helpful, especially when combined with TheoryCraft, one of my all-time favorite AddOns, which can tell you how much damage/healing your next 1% of crit or hit will add to your various abilities. (Theorycraft is not currently combat rating-aware on its own.) One more feature of RatingBuster is its ability to show item levels and item IDs in tooltips. Item levels are conceivably useful for calculating the relative quality of items, I suppose. I'm not sure what item IDs are used for -- modding maybe? Somebody fill me in on that one.
Download RatingBuster at Curse
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Previously on AddOn Spotlight