I've used it actively since natty betas and it isn't all bad. Bugs aren't really a problem anymore, just design choices.
I hate that I can't customize it. Top panel takes way too much space for a netbook and won't hide. The launcher OTOH always hides, but I'd like to keep it visible on my desktop. Worst of all, nothing adapts to font size, so it's an accessibility nightmare.
DockbarX + cardapio on maverick was a much better interface. I could install it on natty, but I've been using Unity in the hope that they'll fix it. I'll reconsider once oneiric is usable.
Edit: In short it has better defaults than the old gnome interface, but it limits tweaking.