Letterboxd has been using Gin for almost 10 years from it's early alpha release to the current version, during which time Letterboxd has grown to a site with millions of users. Gin has been instrumental in optimising the site through this growth, ultimately saving costs as an optimised site requries less resources.

Gin has become a indispensable tool for monitoring the health and performance of our core server software. It gives us tremendous peace of mind of knowing we can fully and completely understand the runtime behaviour of our server software both in real time and at any time in the past. It allows us to quickly and confidently troubleshoot any unexpected behaviour that occurs - which in turn makes us more confident to use a highly iterative and frequent release cycle. Gin not enables us to build more efficient software but allows us to be more adaptable, more aggressive and more efficient in our development and dev-ops practices.

— David Maplesden, Lead Developer, Letterboxd