I'm not sure about the PD and Tech, but I was graduated from the PD and Engg ( Chai Wan ) , it's gonna be disapointing to you if you wanna learn a lot of design stuff in this course, as this course highly aims at the engineering aspect of product, ie, how to design a product with good manufacturability, work-flow etc...but what's good is, there are so many tutors who are good at CAD, you can learn a lot from them.
As you know, design industry in HK is bizzard...I mean, you can only(almost) be a designer if you know how to operate various design software.