The last time i tried OOo Aqua, it just looks like the OOo X11, without the need of X11. It didn't look "Mac-ified". NeoOffice, however, looks "Mac-ified". I have moved completely away from Microsuck Office already, and I have never looked back.It's nice that they're suggesting a very small amount. They deserve it.
Although for me, the only reason I have Neo on my computer is to evaluate it (and occasionally plug it here). I don't see myself leaving Office just yet, or really bothering to install Neo updates. I will probably try OOo Aqua at some point, just to see.