When a user receives an email of a new proof, there is no information about the document's location within Workfront. Clicking the link to the proof takes them to the ProofHQ site, and from within the proof there is no way to navigate to, or even information about, its Workfront location. For a user proofing multiple versions and/or multiple documents on multiple projects, this leads to a confusing mess.
Looking forward to more complete integration of the two tools, instead of just a Workfront wrapper (loosely) around ProofHQ.