I found the puzzle and gameplay aspects super fun but damn did they rush out content and the events so fast at the beginning that it basically died not even a year in. I'm surprised service was active for 2 years. Aside from that, whenever I was bored this was actually the perfect time-waster. I guess there was always something to do with everything being available. One of the more brutal gachas I've played tho since the rates were worse than the usual bad.