There are some annoyances, but for the most part those are avoidable with the whitelist. Two issues that really stand out to me:
1. Viewing plane image files (urls ending in .png, .jpg, etc) get shifted up so half the image is off the screen
2. The frame expanded when previewing images on google image search has an undesirable inversion, making the usually gray/black box white
(I use style #5 from class b styles)

There are also some issues with the text background overlap with many of the styles