At first this game is alot of fun and then....
Mega Man Star Force Leo has pretty solid storyline and a battle system that is certainly different.
But that's about it. Sure It's fun for a while, but if you play it for about three hours every day, you can finish it a week from date of purchase.
Aside from that, the battles do get a bit annoying, especially when there are three enemies that are much stronger than you attacking at the same time.
Brother Bands are a pretty cool- You can wifi connect with other players as well as make Brothers with the NPCs in the game. During battle, you can get a battle chip with your Brother's face on it and -bam- you get to use one of your Brother's chosen, favorite cards.
You can also transform using the power of your satellite admin(Dragon, Leo or Pegasus) and become substantially stronger BUT if you're hit by the opposite element, you change right back.
You'll have fun with this, but that is very short lived...