Depends on what you want to get out of your time at uni. Main pro of degree is that it's good for those who aren't really sure what they want to do so you can really get a taste of anything in science. That being said, you don't get the same security as you do say in an engineering degree at monash for example. Given it's a pretty broad degree, you're pretty much expected to do a masters afterwards if you want to actually have skills that make you employable. Science is also a pretty massive cohort so it might seem a bit isolating but don't think that's much of an issue if you have a close group of friends. Teaching style is dependent on the units you're taking and really hard to generalise, yes, there are some terrible lecturers but a lot of good ones too. Workload is pretty subjective but I've heard it's manageable.
tldr, if you don't have a specific idea of what you want to do yet then science should be good, otherwise, just skip the melbourne model altogether