I have purchased the plugin, and in general it works well, in fact its pathfinding algorithm is infinitely superior to the one that comes by default in RPG Maker, but there are some bugs to resolve.
When an operation like KoTCPathfindToCoordinates is invoked by script or directly in a plugin itself using $gamePlayer as an argument, the operation fails (thisnpc2 fails to reference $gamePlayer). Others functions fails too.
The KoTCPathfindToNearCoordinates operation generates an infinite loop in certain cases when the tile you want to approach is not reachable, but other tiles within the specified radius are.
The plugin itself is good, it has served me well, and I can manage on my own to correct certain errors, but it would be nice if it were updated and the bugs were fixed.
Greetings.