I briefly tried Tilt awhile back. Tilt, Garden, maybe a couple others, settled on DevSpace. IIRC, it aligned best with my existing prod infrastructure without having to rewrite everything a different way.
i.e., it worked with my existing kustomize+k8s setup. It adds portforwarding, and fast file sync into the running containers, which is all I really want. Rebuilding an image every time you make a change sucks.