I remember when I went to the one in San Jose, the place was packed with fans of all ages, a lot more girls than I expected, and a family here and there. There were quite a bit of Miku and Rin cosplays along with the occasional Kaito and Luka and I even saw the rare Teto cosplay once which was a sight to behold. I remember buying a bit too much merch but it was worth it considering how the expo is only once every two years. I wish they gave Kaito and Meiko more songs but apart from that the concert was great, the crowd was full of energy and very friendly and one guy even helped me set up my glowstick. I just wish my arm didn't hurt at the end from all the glowstick swinging.