I always leave the box attached to the (aftermarket Thule) rails. So when we take it off, we just unlock the attachment of the rails to the car and the whole thing comes off in about 10 seconds. I've managed to do it myself, but it's practically a guarantee to add some more scratches to the roof of my car. With a second person, it's very easy. If I had to actually get in there with a wrench and unfasten the rack from the bars.... ugh.
So if you're using factory bars on your car that don't come on and off, that's something to think about too. I don't know what kind of system the one you're talking about has or how complicated it is to take on and off. But I know I don't ever intend to remove the box from the rails once I put mine on there - way too much work.
So if you're using factory bars on your car that don't come on and off, that's something to think about too. I don't know what kind of system the one you're talking about has or how complicated it is to take on and off. But I know I don't ever intend to remove the box from the rails once I put mine on there - way too much work.