This really isn't an installation issue, so I could be in for a hand slap for this post. I'm really just interested in hearing some specifics about other users' success stories with DMX. We've used DMX for a couple of years now and have been very happy with it. I'll give some details our installation, and would truly be interested in hearing of others:
Industry: Energy/Oil
User base: Approximately 700
Documents in DMX: approximately 50,000
Customizations/Integrations: Integrated the Autonomy search product to index DMX documents and metadata; Integrated Savvion Business Process Workflows to insert documents into DMX via webservice; Automated Sharepoint-to-DMX migration (including the retention of Windows metadata such as file creation date);
So far we've been very happy with DMX. It has been very flexible, stable, and as of the 5.2.7 release, incredibly fast for us.