Note that the inline help is a separate download. There are also a lot of very nice guides available for download as well as extensions that add capabilities to all the modules.
Conclusion: Try it
Where Microsoft seems focused on changing the look of its products and optimizing them for tablets, LibreOffice is improving basic functionality and efficiency with an eye for the desktop. It's not perfect, but neither is the competition. Document compatibility with Office and just about every other standard is so good that the average user can make the switch without qualms in that regard.
On the downside, macro and programming incompatibilities in Base and Calc will be a problem for some, and there will undoubtedly be a feature missing here or there that some user just won't be able to live without.
But put aside those years of disappointing alternatives to Office and take a look at LibreOffice 4. Really. I mean really as in click on the download button and install it. I think you'll be pleasantly surprised.
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