The issues that have been identified through support are:
1) doesn't work when you have magic_quotes_gpc enabled on your server... we have files to correct that issue
2) doesn't work when your testing server isn't configured properly... we have been able to address that by correcting site definitions usually to match the remote server.
3) Connection folder permissions can prevent installation on the site. Fixing that is a matter of updating the permissions.
4) doesn't work when using on a site with powercms installed into a sub-directory... you need to copy the powercms connection file into the root Connections folder.
If you are interested we can open a support incident and have someone walk you through the necessary updates to get it running properly.