Are absolutely HORRIBLE.
We drove from DFW to Missouri, going up we took I-35 and I-44. If you have to go through Oklahoma I would only take the interstate. They have recently redone a section of 35 in north OKC and if you like bull riding you'll love it. Major construction before Tulsa was a hassle and going through Tulsa on 44 was a mistake. Take the turnpike around the bottom of Tulsa.
When we came back we started to take 69 in Big Cabin and only made it about 10 miles, I thought the trailer would come apart. There are expansion joints which are actually little dips and it was a washboard. We turned in Adair and got back on 44.
I wish 49 came all the way down to Texarkana. Next time we go we are going through Kansas.