I have played SimCity games since SimCity 2000 and this series has come a LONG way. SimCity 3000 and 3000 Unlimited showed a graphic jump and proved to provide a fun a entertaining way on building cities. Simcity 4 was great! However, this expansion filled in the areas that 4 lacked. For instance, when you start a new city, you begin with 500,000 instead of 100,000 originally in the 4. The graphics are just as good as 4's, if not better. Rush Hour stresses transportation, which is important to any city, but it is not my forte. The best thing about SimCity 4 and its Rush Hour expansion is that it gives you the freedom to have multiple cities that you have designed and link them together in one whole region. No more computerize cities stealing you residence! Now, you make all of your cities appealing and work together. Of course, If you do not wish to make all of the cities (or one BIG city) you can always import cities that have been built in. I found that this expansion covers all the different areas of managing a city with wonderful detail, even though it stresses transportation.
Truly an amazing game. One of the best in the series.