AntiCheat tries to make player classification as simple as possible while still allowing admins to have as in-depth player analysis as they see fit. AntiCheat implements 3 different classification levels of players that refers to the probability that they are using hacked clients: Low, High, Medium. (Who would have guessed!)
Most players stick in the Low range, as you would guess, but you can explore a live list of which player is in what group by typing /anticheat report (you will need the anticheat.admin permission) In addition, if you have the admin permission, when a player's level goes up into a new group, you will be notified in chat of the change.
Remember that just because a player is in medium or high does NOT mean they are hacking, sometimes I find bugs that get a normal player up to those levels in a matter of seconds by doing something that the plugin assumed was not legal, when in fact it was just a regular part of the game. When I find a bug like that I typically fix it ASAP, I don't let them lay around, but you should also be cautious, make sure to question and/or follow players who hit these levels to get the real story.
To get in-depth logging about players on the server, you can turn console logging on with /anticheat log enable (again, making sure you have anticheat.admin permission) and watch the console for information about what certain players are doing that the plugin finds "hacky".
To view XRay statistics for a player, including how much of a certain block they are breaking, how likely it is that they are using xray, and other info, use /anticheat xray [player] and you will get back tons of info.
You can easily forgive a player on your server by using /anticheat reset [player], and their hack level will be reset back to 0 (low)
Updates are pushed to AntiCheat automatically and you never have to worry about updating it, as long as you have Auto update turned on in the config. Turning it off will require you to manually download builds to stay protected, but leaving auto update on will seamlessly push new bug fixes and hack preventions to your server to make it safe. You can view the update status using /anticheat update
For other info/help use /anticheat help
Note (Read this if you're paranoid): AntiCheat uses Hidendra's popular MCStats system to anonymously collect and report data about AntiCheat usage so that I can get a better idea of how updates impact the system. (increase false positives, randomly start increasing a certain check, how these updates change the userbase, etc.). Like AntiCheat, MCStats is an open-source system, and, like AntiCheat, will never bug you about updating, sending information, anything. However, while your participation in this data is totally anonymous (your IP address or any other identifying info is NEVER sent to the MCStats servers, and NEVER shared with anyone), it is completely optional. You can see the statistics that are measured here. I never see anything beyond what you see (because I don't have access to it), and this system is only used for measuring and improving the system, but if you disagree with this usage, it is your right to disable it. To do so, simply locate your "PluginMetrics" folder in your Plugins folder, open the config.yml, and set opt-out to true. Thanks for your support :D