I tried it out of curiosity.
Like Midjourney, the limitations on face rendering are often a problem. It's sometimes unusable. After that, it's all very random: some of Midjourney's images lend themselves well and give a satisfying result, but sometimes it's a mess with an AI that goes off in all directions. Quite random, in fact.
The same positive and negative points can be found with Gen-2. Of course, the paid aspect means that it has to be used for something useful; if it's just for fun, it's too expensive.
Basically, Gen-2 is nice, but you might as well do it like the Barbenheimer trailer:
Just use Midjourney, then process the image on Premiere Pro/After Effects with simple renderings: mist, wind, sparks, and animate the image by making the dress move, distorting it a little, and so on.
This way, it looks even better (for the moment) than using Gen-2.