In a word: incredible.
It's a treat to see just on McLaren P1 out in the wild. Seeing three P1s casually driving down the highway together is just pure insanity. That rare spectacle recently took place in France, where a trio of P1s, along with some other McLarens, made the pilgrimage from Paris to Le Mans. The trek was done to celebrate the 20th anniversary of the McLaren F1 GTR's victory at the 24 Hours of Le Mans back in 1995.
Spoiler alert: There's no high-speed footage or crazy exhaust notes in this video. A trio of cars as stunning as this one needs no help attracting eyeballs.