I have to admit, the first thing I thought about when I saw it was "phpMyAdmin" and "security vulnerabilities". I hope I'm simply being uncharitable, but I'd have to have a lot of faith in the product and the underlying stack before I let a web-based GUI anywhere near a production database.
As the author of a comparable tool (TeamPostgreSQL), most of our users use an IP whitelist in their firewall to access the web client. Of course, you can also use the tool on your local network only as a substitute for a regular admin tool.
