It isn't that difficult to fit the front or the rear sway on MK5... It is important to do it on the hoist. Front sub frame has to be lowered a bit, at the same time supported with jack. Front comes out in no time. After the New sway is in place it is critical to line up the subframe, and fit it in exact same position, otherwise, it will be near imposible to get the wheel alignement done correctly.

Rear sway is even easier to do. 4 torx bolts in and out.

Wheel alignement comes next, and than road test

And to answer Mischas question. Not sure what material other manufacturers use, H&R swaybars are produced by using a proprietary alloy that is stronger and more resilient than the original stabilizer bars. At the same time H&R use exclusive composite bushings which eliminate squeeks and according to H&R, never need lubrication