Installing it on an FJ roof rack was a challenge when I had to bolt it down. But this shower is awesome, only used it once so far but was able to rinse off all my kite surfing gear and myself and 1 other person. Be careful with roof top clearance. If clearance is an issue, get the 4 gallon version and extra water to fill it up and pressurize on the go.
2012 Toyota FJ Cruiser