Kits, while not terribly expensive, I think are overpriced and do not offer much gameplay. If you tell me it's the price of coffee, I'll tell you I don't buy 5 EUR coffee. Also, I feel they impact on release of SPs and new gameplay even though EA says otherwise.
Sims 3 Store, on the other hand is pure evil, they released all rabbit holes in the game and put all interactive venues in the store. I am still waiting for the car you can tinker to sell independently of the world it comes with, same with the air balloons. Also, it is still very expensive.
