I enjoyed the subject heaps, both the year 11 and 12 syllabus
Just like every other subject, you need to put effort into geography to do well in it, however the content is really interesting which encourages you to study it.
The scaling for geography is decent, however you shouldn't really take scaling and stuff into account when choosing your subjects (unless you're deciding between advanced and standard english). If you do well in any subject then scaling will work in your favour, if not then it won't.