I have seen ads about a knee replacement called "the getaround knee"how does it compare to those been done over the last several years?

Doesn't: I am not a big fan of tv marketing. All knee replacements currently around are good products. Any change a manufacturer makes will not be seen in vivo (in human conditions) for at least 10-15 years. Its similiar to the difference of shopping for a bmw or mercedes. Just different bells and whistles. I tend to stick with companies/knees with a proven track record like the insall knee.