I remember finishing Wishbringer back in the day. Wishbringer is the only Infocom text adventure that I can tolerate. The fact that this game was easier than your average Infocom adventure helped a lot.
Well, if you want to play Zork, The Lurking Horror, Planetfall and other Infocom classic online, just head on over to this link here.
Man, it's nostalgia time whenever I remember having a pen and paper just to map out the town in Wishbringer. At least try one game. Give it a chance and relive the classic text adventures of yore.