The Nations is not a spectacular game. However, if you've been playing a lot of classical RTS games (like Age of Empires, Starcraft, and Empire Earth) the change in style will be a refreshing one. The Nations is not a standard real time strategy game.
That said it takes a bit of getting used to. It is a fun game and a great slow paced way to relax. The emphasis is not on combat like many strategy games. In fact, managing your town is almost reminiscent of Black and White. Adding to its relaxing effect is its great humor. It also has three campaigns which means its long enough to be well worth your money.