The Ghost Max 3 is the tall, soft cousin of the regular Ghost. Brooks stacks DNA LOFT v3 on a broad base and shapes the sole into a rocker, so the shoe rolls you from landing to toe-off instead of asking your ankle to do that work. The drop is 6 mm, lower than the Ghost's 10 mm.
It suits recovery days, the morning after a hard session, and runners who want protection rather than feedback. That wide platform also makes it steady without any medial post, which is why it works for plenty of people who normally reach for a support shoe.
It is not light and it is not quick. At over 300 g the stack turns sluggish the moment you ask it to change pace, so keep the fast days in something else.