Decent game but it lacks depth. The gameplay is very repetitive. There is no customization features for characters. Some characters are almost worthless without duplicates as preemptive strike is very important. The rates in the game are pretty damn bad, especially since the summon pool is very large. They also take an extremely long time to put out new content like story chapters that you'll finish in an hour. Their idea of content is new characters, so get ready to spam the same stages.