I don’t get this comment. With the square bars you just clamp anything straight on. With the slots you have to faff about with the plastic strip in the slot don’t you (ie. cutting it to the right size, slotting bits of it in and out in the right combination for whatever you’re putting on). Or do people not use the strip. I’m not trying to be augmentative BTW, genuinely interested I currently have square bars but am considering aero/wing bars for an imminent car change.
As the family grows and outdoor activities become more frequent, you will slowly but surely run out of room in the car. One way to create extra storage space is to transport items on the roof. Roof racks offer a stable base for any load, and with the right accessories you can adapt and mount the racks in any way you need. Racks are constantly being improved and tested, but the basic principle always remains the same: create the perfect combination of suitability, reliability, safety and ease of use. Don't waste any time: mount your rack in just a couple of steps and you're ready to go.