Just got back last night! LOVED POFQ.
The boat only goes to Downtown Disney/POFQ/POR. We used it several times and really enjoyed the more relaxed feel of boating over busing.
You need to use the bus to get to any of the parks (or go to DTD by boat and transfer to a bus.....but that would add LOTS of time to your travel....don't see any point in that unless you needed to shop first or hit an eating establishment)