I have a 5 door (not the 3 door) and have a thule system with the alloy aero bars (silver, sleeker and quiet) All with locks.
I carry 3 bikes (2 adults and 1 child’s) using the thule 591 cycle racks, same racks fit on our Audi Avant so its nice and easy. Tend to use it all more on the audi as it does dent mpg, but if you are carrying bikes they are secure and out of the way, and you get easy access to the boot, quick and easy to fit and take off, just watch the paintwork, make sure the car is clean
Got the bars, foot packs and rapid fitting kit all 2nd hand on ebay – got a good deal. Had the same make on my old Mk4 with no issues