MS Office 2007 (Beta) vs Google Docs & Spreadsheets

Sometimes my children will travel without their notebooks and want to access some MS Office documents on my pc. Occasionally Open Office didn't open their files so I installed Office 07. The thing that is most annoying about it is, if it hasn't been used lately, it goes about reconfiguring itself every time you go to use it instead of just opening. Also, and this is really strange, when attempting to do scans with registry cleaners like CM DiskCleaner or RegistryMechanic, it (office) reinstalls before you can scan (what's that about?). So my question is: should I just remove it and rely on Google or just put up with the minor annoyances of Office 2007? Thank you for your opinions!