Works fantastic if you put it together right. I have msi 980ti. I was gaming upper 70c. Now I pushing 45c tops (gaming of course) 28c idle. I used the original backplate and fit "like a glove" no shims or ram heat sinks. Swapped out the fan for a better one.
Bought for my Xperia z2 Tablet held perfect for a week then started to separate. Now I have some parts taped and some separated guess I'll do a redo and widen the coverage.