What are your thoughts about this new service from eMove? Pros cons?

eMove announced the Centralized mail service, integrated within WebSelfStorage management software, meaning there is no third-party involvement for the mailings. Their system is fully automated and all unclaimed letters are sent back to the facility address.

The cost is the same as first class stamp and there are no additional labor, materials or postage costs.

Any feedback on this? Has anyone used a service like this before?