I worked on an implementation that helped to migrate from a proprietary Unix based system to KnowledgeLake's Capture Server and Imaging solutions. We initially implemented about 15 content types half of which were scanned images and half which were brought in electronically from an ERP system. Indexing and autoindexing was very powerful.
Once implemented about 2k documents a day were being added to the system, with no signs of strain from the load.
When there were configuration issues, we received very good support.
In addition, our users found it very easy to learn.