and besides which, as you seem to dislike Microsoft products so much OpenOffice seems a good alternative.
The good thing is it is fully compatible with M$ Office saved file extensions, so you could use it and still be able to work with colleagues and friends with their M$ Office documents.
To be truthful I have only updated OpenOffice once, but on my broadband connection the download wasn't a problem. I don't remember whether I had to uninstall the previous version or not, so it hasn't registered as a particular difficulty to me.
There may be more OO updates available to me, but I am happy with what I have so far.