Up front Egao no Daika is nothing special. If you look at the raw of it, it's fairly entertaining but nothing special.
The reason I love this anime though is the message behind it, the problems with war - how war is sometimes necessary but other times useless. This overall message presented throughout the show is really striking to me and is a topic that should be discussed more especially the realness it portrays with killing off some key characters. The name of this show translated truly reflects all of this...The Price of Smiles.
I do wish it would not have been as rushed and we could have seen more action as for a mech I really enjoyed the battle scenes.