Looks sketchy...one bump and you shatter the window. End of trip. I keep my board inside if I'm alone, get a Thule from eBay...I wouldn't trust that thing.
2015/16 -17- Kirkwood days
Arbor A-Frame 158 2009-10
Jeremy Jones Hovercraft 156, 2011/12
Subaru WRX 06 - 181K