I do agree with LingonKungen, its even worse because if you up one of your weapons and the energy cost to up any others rises as if you have upped them! 3/5 giving an extra star for the story plots...
It's a awesome game, if you look at the graphics, the way the monsters move, the size difference of the swarm monsters, the new structures avaliable, the keyboard shortcuts, the mana refund... Seems much better than the previous gemcrafts. You get the notion of the size of the game at the very beginning, without the sensation of the other gemcrafts "omfg, this game will never end!". The premium features locked will only restrain you at getting some amulets, but, what do you want getting all of them? You got nothing more to do?