Fun idea at first, discovering new mechanics while the car you're in swerves to make them even more spicy to understand and work around. Gets you to start thinking this might be a fun road trip with new wonky stuff to do.
Fucking 12-20. What the fuck. Just the absolute hell of block count management while the boss pushes you over and starts kicking you in the nuts. I had to run a variant of Dr. Leon's stall strat just to scrape my way out. The perfect boss to make you change your mind on how much you like the spies mechanic.
I'm just gonna go back to leisurely chipping through the challenge mode stages of the earlier chapters and let the H12 stages be a problem for distant future me.