Not only is it the only game that runs Pathfinder 2e rules, but it will probably forever be the most charming take on a turn-based ttRPG adaptation. It's simple and it's all the more powerful for it.
Its simplicity and various options make it a powerful engine to make Pathfinder content in, and the community already made it a beast beyond its main campaign. And a wonderful adventure the main campaign is. It does feel more like a tutorial for playing Pathfinder, and its story is nothing to write home about (though I love the setting it created), but because of that it captures the spirit of table-top roleplaying. Its just a joy for any fan of ttRPGs.
For the low cost this game gives you everything it could. It would be worth it just to be a VTT engine.