Others say...

"WHAT are they all talking about?!?!?!"
This is a great game!!! Come on! There is WAY more scenary and are WAY more rides to play with! Some are complaining about the number of scenarios but the big thing is that you can create your own scenario and pack it with TONS of cool stuff and just play and play!

"Must be ADVANCED"
This expansion pack is good (for a "roller coaster tycoon"}. I thought maybe it would give me extras in any theme park but no, I could only get Wacky Worlds theming and roller coasters in the new parks that Wacky Worlds added which had impossible goals. All "roller coaster tycoons" out there this expansion is perfect for you.

"Awesome Expansion for an Awesome Game"
This expansion has new rollercoaster types, new scenarios and new thrill rides. I am disappointed that there are no new shops.
My favourite NEW thrill ride is the Chinese Firecracker. It's the same as Enterprise, but I think it looks cooler.
My favourite NEW rollercoaster type is Limousine Rollercoaster. I used to recreate my fave rollercoaster the Rock 'n' Rollercoaster At Disney World, Florida!
None (or very few, I can't remember) of the new rollercoasters have pre-designed rollercoasters. So go to the Roller Coaster Designer and let you imagination run wild!
If you want, but the Roller Coaster Tycoon: Wacky Worlds Guide. It's not essential (I didn't buy it) but it just has a few hints and tips to get you started. Buy if you have extra $.
You MUST have Roller Coaster Tycoon 2 to play.
Summary: The game is great. A LOT better than Theme Park World!

"Absolutely terrible"
The expansion is nothign but a collection of very very poor scenery items. Nearly all of the items are not to scale with the game and they do not fit with the artistic style. There are no new rides, contrary to what they say, there are only new cars for your existing rides. And while that may sound good, only a few are actually enjoyable. This expansion is the worst of the worst. Avoid it at all costs unless you hate having an extra ($)

"Don't Waste Your Money or Time on This!"
RollerCoaster Tycoon is probably the best amusement park simulator game out there. The add-ons, Corkscrew Follies and Loopy Landscapes were great additions to the game. Then came the sequal, RollerCoaster Tycoon 2. It was between good and bad, but for the most part, good. Now, RollerCoaster Tycoon 2: Wacky Worlds. I hope none of you waste your time and money on this piece of [garbage]. It is by far the worst add-on for the RollerCoaster Tycoon series. Everyone wanted newer flat-rides, and they gave them to us, but they were just the same ride with different theming on it, like tea cups and cars and such. There were no new roller coasters or any new rides. They were all just modified from the oens in the original first two games. The worst part though would have to be the scenery objects... Some of them could be useful at times. I really think that the new scenery pieces look horrible and don't look anything like the original game's scenery. You can tell that the creator of the game, Chris Sawyer, had no part in this game... Hopefully, he will in the Time Twisters Expansion Pack. That game sounds un-[romising too...

So, I advise anyone not to buy this game, but go and buy RollerCoaster Tycoon 1 and 2 with the add-on packs, Corkscrew Follies and Loopy Landscapes.