Question: Wouldn't Wapedia + ads take up more screen than Wikipedia Mobile + UI? Fullscreen wouldn't be that great if you're still missing a quarter of the screen.
I have been using Wikipanion since 2.0 and don't intend to change. It looks good, has more features than you could possibly need, there are lots of settings in the settings app and there are no ads, even in the free version. A faultless app, both free and paid.