Truth be told, many of your Office/Win skills won't do you too much good; Office/X is a very different beast. This is good in places and bad in others, but either way it means that you're pretty much starting off on a clean slate. That said, you probably have a lot of old Word documents lying around, and although AppleWorks' .doc handling is decent, there is no substitute for Office itself.
Really, it's a pity about AppleWorks. Back in the OS9 days, I would have recommended it without any reservations. But its original port to OSX was so bad that it permanently stained the reputation of Carbon, the API used to port it. Most of these problems have not been addressed in the two small updates which were released since that time.
I want to see AppleWorks get the attention it deserves from its own developers. I can't say I'm holding my breath, though. I recently switched to Nisus Writer Express for word processing, and I'm looking for a good spreadsheet replacement now.