This game has so much latency when you push a button and hear a sound. The PC version is ok, laggy but at least has low latency audio, but Konami stuff is so expensive and it's missing most of the songs I want from arcade version.
I just prefer IIDX and BMS honestly. I like to actually hear the sound when pressing a key/button, instead of like pop'n music with this awkward delay, where I'm hitting keys 100+ ms off the actual rhythm. EZ2ON and DJMAX are pretty good if you like that style of kb game, too.
But pop'n music was fun. I played it in arcade up until Sunny Park only. I could clear about half the 48s. Tried a few 49s, failed always. Looked at level 50 such as Silent/Ongaku, just no way i would even attempt that madness. Is there anything harder than that one, in the newer mixes?