The great thing about OU is that they notify you of your acceptance the day after you interview! Talk about low stress.
I thought OU was a very nice school. Great facilities, the people were exceptionally nice. One of my interviewers took me on a walk during the interview! It was really cool, and very laid back. I also think that OU has one of the best organized programs for 3rd and 4th year compaired to other osteo schools (just my opinion)! Plus it's instate tuition (a huge bonus)! Also, OU is actively persuing research in their program, as well as offering a DO/PhD degree. This will allow you a chance to get involved in research which will help you out when it comes time for residency applications! Good luck.