Check-in was botched. Even though I paid with Hotels.com OneKey cash, they charged my card for the full room rate. That was later reversed after I complained, but that's not drama I'm looking for.
The room itself seemed to be clean enough. I saw no visible bugs, and the AC/Heat worked fairly well (despite only having one knob instead of two -- I had to move the knob back and forth between temp control and run mode...)
You are not allowed to go into the office ever; instead, check-in and check-out are through a small window with a smaller pass-through on the front wall of the office.
Hotels.com listing shows free breakfast and coffeemaker in room. NEITHER of those things are present. They do have a sign posted to alert you to those things when you check-in, but I think they're banking on people showing up and not being willing to go to the trouble and effort to rebook somewhere else. Nefarious.
I would not stay here again, I would not recommend. I would instead suggest staying far away, and letting Days Inn corporate know that they have a lazy, crappy franchisee in Oklahoma City.