At the beginning of the game, it might seem clunky/old/boring but it comes off as one of the best world domination games ever made, for a more complete review be sure to see my channel, but just a quickie:
-A good administration game
-different rooms
-different minion and enemy types
-different genius types
-world action options (including missions, crew behavior, region responsiveness, etc)
-many traps and defenses
-a good AI (you have to consider that it was the early 2000's)
-not an idle game but an RTS
Anyway hope it helped your choice to buy it, definitely worth it, and look out for the 2020 evil genius 2!