Please, please reconsider. What if you are a scar tissue generator like me? If I had both knees done at the same time, I would have been in a wheelchair with Arthrofibrosis, for which there is no solution at this time in medicine. If you have any history of past adhesions, like frozen shoulder, endometriosis, etc. , you will end up with this nightmare scar tissue. I only had 30 degrees flexion. Thank goodness I still had one knee I could depend on. Please think about this again, from the point of view that not every surgery works out well. I'm sorry, just have to speak up here.