Rush is great.
To me, it is an incense scent. A very modern, bright and stark incense scent. I find it strikingly similar to Passage de Enfer by L'Artisan Parfumeur, although PdE is a little less synthetic, therefore it doesn't last as long as Rush.
Plus the bottle is really neat.
Most people don't talk about Rush here, IMO, because it's discontinued. GPH isn't.