They work the same way the other QuickFit Harnesses work, which is to say they are extremely easy to install and use. They attach to factory mounting locations and require only a couple tabs be installed on outboard locations. Once the initial installation is completed, you’re free to put them in and take them out as simply as you would buckle and unbuckle any normal seatbelt buckle.
Remember, the difference between QuickFit and QuickFit Pro is that the QuickFit Pro is designed to be used with a HANS device and has a central Cam Lock instead of a more conventional buckle. Read more below about each option: