Submit Your Testimonial About the Experience How was your overall experience?: Poor Good Best Satisfactory Excellent Comments: Dr Darr performed knee replacement on my left knee Nov 14. 2018 & 8 weeks later on Jan 16, 2019 did knee replacement on my right knee. Everything went so well with my left knee, I was ready to do the right one. Dr Darr was very professional & explained everything very well. I enjoyed working with him, Crystal, Mary Jo & all the staff @ Aurora. I am pain free in my knees and pretty much back to normal, fishing, hunting & working on my Hobby Farm with my wife, Horse, Dogs & cats. I would recommend Dr Darr to all my family & friends. Thanks Dr Darr !!