I've been playing Civilization since the original version, and it has always been one of my favorite games. However, as time has gone on, and the game has been upgraded, it has become somewhat unmanigable. Too many things to keep track of, too much to do, too hard (or in some cases, too easy) to win. Four has kind of lost its glamour for me.
So I debated with myself about whether or not to get this version. I have to say, I'm glad I did. It's rather like playing Civ 4 crossed with the original game--the amount of things you have to keep track of has been very trimmed down, and it makes for easier gameplay.
My only issue with this new version, and it might be a DS issue, is that it doesn't last very long at all, because the continents are so tiny. I'm now curious what the differences between the DS and Computer or platform versions of the game are.
I do think, if you've become rather disenfranchised by the series, this is a good way to get back into it once more.