Just bought 70315 Clay's Rumble Blade, and my son couldn't wait to get it home and build it. I am very impressed. It is probably the coolest, funnest $40 Lego I have ever bought. Great minifigs, LOTS of play-ability, colors are a little shocking on the box, but in person, it looks "just right". A set that combines the main hero, robots, fire demons, swords, "power-up" shields, motorcycles, a flying ship, and a missle-firing ATV... that just has to be a winner. Of course, I think the key will be if the TV show can get a serious fan base like Ninjago, but so far, I really like this theme. I'm already looking at how to get a complete set of the minifigs... looks like Lego has split them up well so that you have to buy 4* sets or more to get the five main heroes and villain. And if I'm not mistaken, I think Axl - one of my favorites - is exclusive to the $100 Fortrex.
*My mistake... I think you can get them all by buying Fortrex, Jestros Evil Mobile, and the Beast Master's Chaos Chariot ($100+$60+$30).