No worry man, we have done a sizable implementation of DPM to backup SharePoint farm of a listed customer, and DPM passes a series of comprehehsive recovery tests without flaw. Though we didn't have a demo to share, but it's pretty straight forward to try out by yourself... except you need a recovery SharePoint farm when doing indivudual item recovery, luckily that can be a VM. And that requirement will be gone in next version of DPM regarding MS roadmap.
In general, out customer is still quite satisfied with DPM and we received no fault complain until now, after 15 month of that SharePoint backup solution deployment.