It does what it says. Entries are now much more pleasing. An annoyance is that if you're editing in Wikipedia, you start with Wiki's standard layout, but after preview it goes back into Wikiwand mode.
The biggest problem is that the Wikiwand site now can capture your every access to Wikipedia. That's why I uninstalled this even though I liked the other results.
I would've given this 4 stars if not for the privacy issue.