Fun game, definite improvement over the original!
These guys did a fantastic job of improving both the graphics and interface over the original game. It looks great, and it also plays great.
For those of you looking for a can't lose but fun strategy: forget special attacks and turrets, focus on income level upgrades and unit upgrades, cruising through the entire game using only support units. You can control the pace of the game and check out all the eras that way.