Nothing.
Tight, quick, roomy, quiet and comfortable.
I have owned most cars on the market in the last 40 years of driving - this has the comfort and quiet of a Camry with the handling of an Accord (my previous favorite cars). I used to road race sports cars and really appreciate the flat cornering and quickness.
Ha ha ha.
I'm so glad to see that Kia dealers post comments to this bulletin board once in a while.
I am not a Kia Dealer - I am a 60 year old grandpa who bought this car for my daughter - liked it so much I gave her my '96 Camry instead! If you like driving a stick shift with great handling and good low-end power, try it!