I got Calendar Calendar Events synced just fine, but apparently it won't sync Google Tasks. It wants you to use the Samsung-specific task system I guess. That sucks.
As soon as I root my phone I will delete the calendar app. I use the "Jorte" calendar app (available in Play store) which syncs everything and has the most robust options of any calendar app that I've seen so far (wince the last time I went app hunting last November, could be new apps by now). Jorte allows you to view Google Calendar Events and Google Tasks at the same time in multiple, customizeable different types of views (monthly, various versions of weekly views, daily, etc). Jorte is SUPER customizeable. I have found no other app that comes close in terms of functionality.
Another app call "LLama - Location Profiles" lets you automatically customize just about any aspect of your phone depending on your location and time of day. It will change your profiles automatically when you enter or leave a location at certain times. You can even tell it to remind you about something based on location and time. For example, you can have Llama remind you to "Clean Mom's car" when you arrive at Mom's house, or to "Ask my boss that question before I leave work!" if you are at your work location and it is almost time to leave.
That's a shame Samsung won't let you sync Google Tasks.
It's even more of a shame that Android's native Calendar app doesn't support Google Tasks. Come on now Google!