I noticed on the website that if you're doing engineering/science double degree, you can graduate with an eng degree earlier than your overall course length (eng in your fourth year of a five year degree) or with a science degree. Anyone have any experience with this?
This is what is known as alternative exits. Some degrees allow you to graduate early with a different degree or one of your degrees as long as you meet the requirements for that degree.
In the case of Engineering (Honours) and Science, you would basically have to choose units as if you were taking a single degree in Eng to be able to finish it in 4 years, or a single degree in Science to be able to finish it in 3 years. Both of these degrees taken as single degrees are normally this long anyway.
The alternative exit choices for Eng/Sci are mainly for people who no longer want to do the double degree, and wish to only study Eng
or Sci without having to go through the hassle of transfer applications to move themselves from a double to a single.