One of the reasons why we purchased Henning Software in 2002 was the ability to make changes and customize the software to fit our company, this still stands true today.
What I like best about this product is its ease of use.
The systems that were so complex meant that we would get a 40% value right away and hope to "use" the great features eventually.
We had tried a ERP/MRP software in the past that failed miserably for a few reasons, we then reverted back to all the documents we had created over the years until we found EstiTrack.
What I like least about the software is the inability to size the screens inside of ET.