Attack on Time boasts great artwork and great voice acting. However, at the heart of it all, it's a typical waifu raising game with auto-battles.
While the waifu raising portion is indeed loads of fun, the battle portions are severely lacking. Yes, I know, it's auto-battle, though even that is pretty bad, as the game just features portraits of the girls fighting a portrait of an enemy and nothing much happening. I mean, the loading screen has more animations.
I guess the saving grace are the waifus themselves. Overall, this game is just... meh. It's still F2P-friendly though, but if you like more complex and challenging games, this one ain't for you.