I've rarely encounter bugs in Anki. The ones i have encountered have been the result of me hacking on it in some way. Sure it's hard to use and pretty clunky, but i wouldn't call it buggy.
id beg to differ. i've had plenty of bugs happen myself and you can find tons of posts around the web of people experiencing similar frustrations. I'm sure there are decks that people make that are less error prone when syncing, but that is not my experience with the decks i make.