just did my first long distance travel in the malibu

well I just got back from a weeknd 1000 miles round trip to Tennesse, I have three things to say:

1. I was amazed by how well the 4 cylinder/4 sped did, no problem going up hills whatsoever, normally a car would reduce speed due the incline but not this malibu, I kept passing cars like nothing, the performance of my car was amazing over all, I got 28 mpg going 80-90 mph so I think that was great!

2. The only two complaints I have are: the seat belt got on my nerves since it's so thight, it kept pylling me towards the seat, so bad that my shoulder hurt the next day, It almost felt like I had a bruze. It was annoying!!

3. One weird thing that happened was that I had water sitting on the rear passanger side, a good amount too, at first I thought my wife had spilled it and was not big deal, but on our trip back there was the water again!! Anybody had this happen?