API Gateway Pattern: when to use it.

so I've been thinking about API Gateways, you know? we're a growing microservices shop and the idea of having one spot for clients to hit, managing auth, rate limiting, and routing, sounds pretty good. but is it always the best way to go? when does the hassle of managing a gateway become more than it's worth compared to clients just talking straight to the services? would love to hear what you all think and what you've seen.