A very good expansion, but isn't the best in my opinion and had alot more potential.
Now that all sounds and looks good, but the only 2 gameplay improvements is really the gardening and fishing aspects, which is quite big difference to be honest. I love hw if your family runs low on money they can simply go fishing and sell the fish or to go gardening and (after a long process of taking alot of care of the plants) selling them off.
Another addition is the garden club, which you can call in the "Services" section of your phone and they will send a representative around. When they come around, you can talk to them like any other sim, buy a potion which cures you being a PlantSim (Common side effect from excess gardening. It switches your moods to Love, Light and Water. They are all pretty self-explanatory. Love is to talk to people, Light is sunlight and Water is showers etc. Their skin turns green and they get root-like hair, wearing just these green robes. To turn to a PlantSim is really quite humorous) or you can request garden club membership.
When you request membership, the representatives will start inspecting your garden, rating it and dropping in in your chat box to drop little comments as to where you can improve or where you excel. They can take into account how sparse your garden is, the quality of your plants or trees, and whether they're bug-free or not.
When it boils down to it, Sims 2 Seasons is a pretty good expansion pack that i'd recommend to anyone that thinks the aforementioned gardening and gardening club sounds cool, or if you're just a huge fan of the sims and want all the decent and beyond expansions, and though it adds very little, what it does add makes up for that. I give the Sims 2 Seasons a 6.5.