After giving D&D 4th Ed. a go, and giving it up in complete disillusionment, I looked forward to FantasyCraft. I was not disappointed in the slightest.
The book's already many classes are easily customized with Specialties to bring an entirely new flavor to the character, like the old 'class kits'. Instead of ECLs we have special abilities granted by feats, bringing user-friendliness to a lot of popular character types.
The NPC creation system allows an adventure to be scaled quickly and easily to any character Level. And the Reputation system helps GMs control the 'magic item lottery' that focuses too many fantasy games on all the magic 'bling' the characters can accumulate, and not on their innate skills.
Finally, the system actively encourages tweaking, through the use of campaign qualities. Want a historical game and no magic? Easily do-able. Want characters to have more/less feats, skill points, critical hits? All easily done.
All in all, I can't recommend FantasyCraft too highly.