not at all annoying... windows are already tinted ... there's just heaps of glare... I had the window sox on the landrover for about 5 years and basically put them on and forget - the only thing that killed those in the end were the harsh aussie summers... no hinderance at night either... I just left them on and perfectly legal and I know they work great for filtering out the UV rays for the little ones eyes.... AND they can't throw anything out the window LOL!

I think it will be trial and error to see how they hold up and willing to do that as I know they were great in AU.... and I can give my critique to the manufacturer!