First off let me say, I have installed literally hundreds of scripts, from the simplest to some of the most complex. I can not get this one installed. It looks very promising by their demo site, I wish I could use it, but it doesn't want to connect to 'localhost' to install the database. In most cases I would simply use the .sql file to dump the data into the database, but theirs is a dynamic sql file (dump.inc.php), so that's not an option. What's more, I tried signing up for their forum (which is pretty difficult to find) so I could get some help, but I've yet to receive the confirmation email, so I can't even get into their forum for help.
I'm giving this script 3 stars because I can see that they are truly making an effort to build a top quality, open source auction script. I'm no nube by any means.. like I said, I've installed hundreds of php scripts. I'd like to make a couple of suggestions, as follows.
A) Don't use dynamic sql files. If that means splitting the sample data and install data into separate files, so be it. That way people can use phpMyAdmin to dump the data into the database, if need be.
B) Add a link directly to the forum right on the home page. The current link takes me to a page that suggests visiting the forum, which has a link to a page about how wonderful the forum is and includes another link back to the original page that suggested visiting the forum to start with. How complicated does it have to be? Put a link on the home page that says "Forum" which when clicked, actually goes to the forum!
You might also want to look into that email thing. I'm still waiting for that confirmation email. It is simple little matters like this which often make or break what looks like an otherwise excellent script.