We unfortunately haven't integrated with Landerlab yet. Its in progress, we're planning to release a custom API endpoint for them to integrate with since our full customer API is behind schedule.
That being said, the integration just automatically pushes new landers into our system and not much more -- so while convenient, it only really saves a few seconds.
We are going to try and work on something better with them e.g. automatic two-way sync, syncing tag on their side with category on our side etc.