I want to give this plugin a fair rating after having used it for many, many years in the past.
It's an awesome plugin for smaller servers, ideally with a whitelist but beyond that I wouldn't recommend it.
The plugin itself does a little too much beyond just claiming and often times I felt like I am not in control of everything the plugin does. Furthermore it lacks the love it deserves in my opinion, lack of updates, lack of much being done in general. Yes, the plugin works but once your server starts reaching a certain size it will soon not be enough in terms of features.
Yes, this plugin has served me well for quite some time and I still recommend it for "simpler" servers but if you want something a little more advanced and with more control over what's happening within the plugin, it might be time to search for another alternative.
The last server I used it on was one where people had creative and could build wherever they wanted and claim massive areas. The server would constantly lag due to so many checks happening in the background to so many blocks that I couldn't keep it on the server. See
https://github.com/TechFortress/GriefPrevention/issues/1859
And if you want to use some PvP of the plugin it's lacking in terms of features and power of what can be done in my opinion, often times not working too well with other plugins such as AngelChest. It was a pain to get it to work as I wanted it to.
I still hope this plugin will continue to receive updates as I'm sure a lot of people still love using it, I just thought I'd give an in depth opinion of mine.
Wishing the plugin only the best <3
~Folas