i wouldn't buy a Kia unless i was paid to. they are always breaking down and you don't get much back if you try and sell it. you should look into the Nissan Quest or Toyota Sienna or even a Mazda MPV.
i know kia has their 10year/100k mile warrenty, and the best safety ratings of any minivan, but is it dependable? In the past, kias have had a bad rep for being cheap cars that break down a lot and have a lot of problems. But is it possible that kia may have fixed these problems and have come out with a more dependable minivan? I found one i like a lot, im just really nervous to buy a kia, anyone buy one and have problems? what problems did you have?