I could say Unity is trash, but well it's really non sense even for joking, they are somewhat professinnal behind the scene so ... !

IF i would have to make Mobile games, i won't choose Unity , but Shiva 3D that is really less expensive than pro version of Unity Iphone,and can publish to all mobile patform with indie version !
And it has real possibilities , just by seeing some great games (like some last 3D RPG) !

So you see , not one other is trash, it depends on your goals , points of view and money sometimes also !