After implementing several projects with Flux, we have recently begun using ArgoCD and have found it quite satisfactory so far. 

The user-friendly graphical interface is a plus. However, we do miss the image updater from Flux. 

ArgoCD is also developing an image updater, but it's not yet ready for production and doesn't offer the same features as the Flux Image Updater, as it only controls the Application CRD. 

Moreover, we're uncertain about ArgoCD's use of custom CRDs, unlike Flux which uses native Kubernetes resources.