Rp Tutorials

does anyone have experience using free wiki hosting services? for rp, school, personal, whatever. what do you use and why do you like it?

wikkii.com has my favourite clean, bare-bones, closely-imitating-wikipedia.org interface, but it is insanely unreliable and i can barely access it 90% of the time. it's pretty much unuseable now which sucks because it was my preferred choice for rp purposes.
wikia.com is fugly but more than that, it's really sluggish.
i used wikidot.com for like half a second a year ago and it looks promising but i'm nervous to commit to a service without knowing how reliable it is. there's also wiki-site.com but again, i'm not sure how reliable it is?

our mod's been trying to install a wiki in her personal domain but for some mysterious reason it won't install right. which is super weird because it worked fine before. in our last game, having a wiki enabled us to get a ton of world-building done super fast with lots of input from the players, which was great because it felt like everybody's game, not just the mods'. i'm dying to have that again but i'm gunshy about committing to a service that might crap out on us unexpectedly like wikkii.com did, ahahaha.