Thanks for this amazing comment! Overleaf definitely came from us solving a problem we had ourselves, and we've always continued to use it, which definitely helps you catch bugs and UX issues.

We've also hired a great team who have expanded on using Overleaf with clients -- for example, we use Overleaf for documentation when onboarding a new institution or publisher. It's really helped, and it's broadened out the type of feedback we receive too.

Thanks for using Overleaf! :)