Is geoPlugin net safe?

I've been hearing a lot about geoPlugin.net, and I'm considering using it for my website to track user locations. But I'm a bit concerned about its safety. Can you tell me, is geoPlugin.net SAFE to use? I've read some mixed reviews, and I want to make sure I'm not putting my users' data at risk. What kind of security measures does it have in place to protect user information? And are there any potential privacy concerns I should be aware of before integrating it into my site?