Thule Cycle Racks Rear-high Mounted Cycle Carriers, Has Anyone Got Any Helpfull Advise?

Rear-high mounted cycle carriers, has anyone got any helpfull advise? - thule cycle racks

I am looking for a high mounted rear cycle carrier for my goods Skoda Auto. I have 2 of this interest. The Argos have a universal company of Mont Blanc at £ 49, or a Thule for 109 pounds. I wonder if anyone these or other materials and can be your start with one of these knows to open. The Thule think I'll open the boot, but I'm not sure.

All advice will be greatly appreciated:)