I don't have the Sedona but I have owned both a 1995 Sportage that had 155,000+ miles and I currently have a 2005 Sorento with 60,000 miles. If I can afford it I will never own anything else but KIA. I was in a terrible wreck that completely totaled my Sportage. The passenager area was uneffected by the wreck, and I walked away with nothing but a bruise where the seatbelt pulled tight. My Sorento has been magnificent even though I bought it used a year ago the dealer says everything under the hood still look new.
The downside is the newer the model the more expensive the replacement parts. I am sure that this is probably true with all makes of car but I have noticed that replacement parts tend to be a little more expensive than on other vehicals I have owned. The good part is that with regular maintance they do not need a lot of repairs.
I communte and put 3,000- 5,000 miles every 3 1/2 months. My KIA dealer is AWESOME! If I schedule my oil change and don't just show up, they can have me in and out in about 15min. Much better than the hours I used to wait at Wally World. The service crew has always been very professional, kind, and the head of service is so funny. They are great people to do business with.