All of the Sims 2 kits include only new objects for the game. Your Sims already pay for objects, why should you too??!!
There is no new Sims interactions, no new content like weather, cars, exotic locals, pets or anything else.
Just new objects for creating a party with your Sims. WOW That's awesome (sarcastic).
Just go to the following website to get better objects than the ones in any kit stuff. They are made by people playing the SIms 2 game and willing to create their own objects. You can get lots and lots of them totally free (and it's legal)!
http://www.pimp-my-sims.com/
I hate Sims 2 Kit packs. Only got it because it came out with my Sims 2 Double Deluxe game. This is only marketing by EA for selling objects that you can get for free off the internet. Your Sims pay for objects, why should you also pay for them? I gave it a 2.0 rating because it's easier to spend 20$ on it without knowing that it includes almost NOTHING new than to download stuff from the internet.