This is a simple PDF reader that integrates very well with OneDrive. No annotating other than bookmarking but that's fine most of the time. I really like how the Find feature works, to sequentially find text. Overall a very good experience.

I've used this for several months now and I review a lot of documents on my phone when travelling. More recently I have noticed that the zoom quality is substantially bad compared to when viewing the same document on a PC. For example I was looking at floor plans for a building specification and zoomed in on the Windows phone One Reader app I am unable to read the dimensions clearly. They are very pixelated even though my Lumia 830 screen should be good enough to read these values. I open the same document on my PC and I am able to zoom in to see individual pixels but the image/dimensions are not blurry like they are on the phone. This has happened on several occasions where it mattered and has caused me problems. I hope they figure this out in a next release because having a sufficient PDF zoom capability is very important.