Does anyone have a radiant barrier in their attic?

I'm considering getting a radiant barrier and want some feedback as to how energy efficient it's made your home, how much more efficiently your A/C works, etc.
I'd appreciate any info you can provide!

Answers:
I never heard of this but I would increase my attic insulation to R-30 and add a ridge vent to the roof peak.

Other answers:
Just got a new roof and did a-lot of research on this. Assuming you are talking about the radiant OSB, you should check to see if your roof has slates that go across the rafters (look in your garage). If you do then a large percentage of the radiant barrier will be blocked. Limiting its ability to absorb heat from your attic.
Just got a new roof and did a-lot of research on this. Assuming you are talking about the radiant OSB, you should check to see if your roof has slates that go across the rafters (look in your garage). If you do then a large percentage of the radiant barrier will be blocked. Limiting its ability to absorb heat from your attic.
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