The data sets used to test the above were natural data for tests of Imagefitter. A direct comparison with AIPS JMFIT was performed. I have lots of experience with JMFIT and more-or-less agree with the positional uncertainty that is reported. Imagefitter produces positional uncertainties a factor of ~20 smaller than JMFIT. I submitted a bug report to this affect before (AOCso04226), with a "non-reproducable" resolution. I believe the problem is real, thus the score of A/E. A detailed bug report will be submitted in the future. For simple 1-component fits, the interface is very nice. For more complicated fits, I need to review the documentation. Documentation: There is a do-nothing link on the page (Link to Viewer in the Synopsis section). Documentation is generally pretty good for this tool.