I recommend foxit if you're using adobe reader.
Good point.
As far as Open Office is concerned, I personally think that the devoping team should review the interface to begin with. I'm pretty sure more people would be tempted to use it if it looked nicer. If every suite out there looked almost the same fine, but not when the other suites look much much nicer. We can say what we want, but look does matter, and does matter a lot.
Second, how the dictionaries are handled leaves a lot to be desired if you asked me. I don't use the dictionaries a lot for spell checking. I much prefer to make sure I get the words right and will consult a proper dictionary if I need to. However, I do use the thesaurus a lot for synonyms. With MS Office, it's a matter of right clicking on a word to get the synonyms. Not so easy on Open Office.
And third, setting language is not as nicely done as in MS Office.
All in all, I would say that Open Office has some catching up to do when it comes to minor details, but minor details can mean the difference between winning a contract and not winning a contract, between winning a sport final and not winning the final. So if money is not a problem, I will get MS Office over Open Office. If money is a problem, however, I will have to stick to Open Office.
I am not against Open Office however. If anything, I wish it was much better. I like competition. I seriously gave it a try but sadly found out it was not for me...for now. Once I'm done with University, it will not be a problem anymore. Like Rajagara has said, competition is what is making Microsoft change some of its practice. They did admit that Firefox pushed them to review their browser.