If you have a bona fide need for replacement and have seen a reputable orthopedist, this surgery can change your life.
You will have <1 week in the hospital, perhaps a week in rehab if any, and will have 2-6 weeks of rehabilitation to go through pending any complicaitons, your general health and condition. You will have some pain, stiffness
and muscle atrophy
, thus the therapy. Ask a lot of ?'s.