My surgeon used the Stryker/Mako robotic assistant and I'm very happy with my new knees. The accuracy of the cuts and placement of the prostheses are improved with Stryker. I would find a surgeon who has beed using the assistant for at least 2 or 2 years.

The robotic assistant or even the skill of the surgeon doesn't determine the results. The patient must put in a lot of work pre and post surgery, and for some it can take up to a year for everything to heal properly, although that's rare and it's much less if the patient is diligent.

That doesn't mean surgeons can't make mistakes. If I thought this was the case, I'd consult with a lawyer if there is no satisfaction from the surgeon.