I'm so sorry I failed to reply before as promised. I had the Iovera treatment Judy before my TKR in June. Although recovery was painful, I have to credit the Iovera (and a plant-based diet and strict adherence to my exercises) with my rapid recovery. Since I don't have anything to compare it to, like those getting a second surgery, it's hard to tell, but everyone remarked how fast I was recovering. Now, 4 months post-surgery, I'm walking 10k steps most days, parking wherever I'd like :), and going up and down stairs with almost no problem.
I do still have some numbness around my knee, but it's mostly "weird" and no problem. My knee still gets stiff regularly, but massage or exercise takes care of it.
All in all, if I ever have to do it again, I'd opt for Iovera again. I don't even want to know what it would be like without it! I hope your surgery went well and you are recovering nicely.