Findings
The review found no major issues. At nearly 15,000 lines of PHP this is a very large plugin, which makes it difficult to thoroughly assess. The plugin does store visitor data including IP address so may have implications for data protection.
Reason for the 'Use with caution' result
The plugin has been given this recommendation at the tester's discretion:
The plugin does store visitor data including IP address so may have implications for data protection.