Yeah it's pretty good, depends what your interests are ultimately. Also the management and marketing majors are fixed, so you can't change them if you didn't like one. You could drop one of the degrees if you didn't like it however. Within the double there's also the option of a third major if something else interests you, as there's 8 open electives.
In terms of the study in the course, depends on subject again, I'm not a fan of mathsy stuff, so economics and stats the assignments were difficult and the exams hard, but usually you have a group of mates who you smash the assignments out with. Both tend to have a lot of oral presentations and yep essays too.
The workload isn't too bad, depending on what you are doing. First year I was doing4 units a semester along with sport (15-20 hours per week), then second semester of second year I started doing 3 units per sem, plus a job (15hrs) and sport (20-25+hrs). I'm pretty limited with time, so don't go to lectures, but most are recorded (I don't listen to them either ) but most importantly IMO the powerpoint slides are always put for each week. So with three units I'm usually there 1-2 days, just attending my tutes, it's pretty easy being a business student haha