The short version: 1h, few screws and zipties later the job is done.
Super bright light, sleek and fuctional design, premium touch materials, and super easy installation by my self even without the specific installation guide. For my bike, i didn't change the relais, so other 1000 points for less stress and job to do.
Shipping trought Europe was super fast.
So, I'm super satisfied about this product, even if i'm not a costant off-road rider, i think that with this lights the bike's general view is better then before, plus if i'm gonna fall i know that just few thigs will not crash on the ground.