This review by a OnePlus One forum member seems particularly interesting. It contains an extensive summary of the user experiences and ratings of other forum members who posted reviews.
On the less positive side,
here's an ongoing thread on XDA about OPO QC dates versus yellow screens.
Here's the test to see whether one's sallowphone exhibits the issue. I'll let you know whether mine's afflicted once I receive it. The cure seems to be to expose the screen to sunlight for a given number of hours.