I am not a once, but after this show I might be now.
I listen to a lot of kpop and love going to shows. Any time a group is in town and I have enjoyed any of their music I'll always try to go. I've seen groups as small as Tri.be and Unis, medium like Dreamcatcher (my ults), Purple Kiss, Mamamoo, large groups like g-idle, nmixx, Le Sserafim, and stadiums like BTS.
I think this might have been the most fun I've had at a kpop show and the ladies weren't even at full power. Their sheer aura, combined with energy of the crowd, their killer band, and incredible stages were absolutely stunning. I seriously considered buying a ticket that night to the second night to see them again.
If you ever get the chance to go to one of their shows, do everything that you can do.