sync ALL Google calendar entries and birthdays
In Google Calender one can have more than one type of calender entries, each assigned a different colour (e.g. for work, private, etc.), and embed extra calenders like the birthdays of your contacts.
PB only syncs only one type of calendar entries though. This renders the whole sync feature quite useless for real Google calender users. Please provide a sync to all entries! (For example: Import all events into PB, but export PB calender events to only one specific Google Calender type)

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Jason Almer commented
Actually, if it supported iCAL, or CalDAV and CardDAV, you could support all Calendar systems at once... including Google and MS. So, don't use Google API's.
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Manfred de Jong commented
This would make it way much more usefull!
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Ron Jones commented
Would be great if PB could sync with other Google calendars besides the primary one. Doesn't have to sync with MORE than one, I'd just like to be able to choose which Gcal to sync PB to.