Donny ... I've had both knees fully replaced - first one 14 years ago, second one 12 years ago - ...
Don't know exactly what they are doing now, but back then I woke up in the recovery area with my leg strapped in a machine that was slowly and gently bending and extending my leg ... After 3 days in the hospital where I had PT three times a day, I opted to go into a rehab center to continue that regimen ... Five days later I was back home and then it was outpatient PT - going to the surgeon's PT facility three days per week and doing PT at home three times a day ... It is ALL about the post operative PT if you want to regain full use and strength of the knee and leg ... basically, the PT becomes a full time job ...
When I was in the PT facility, I could tell the patients who were diligent with the PT at home, and those who were not ...
The PT road may not be easy, but, like playing music, you will get out of it only what you put into it ...
If you are located anywhere near this facility - or one of their other locations - I strongly recommend you try to get them to see you ...
http://www.orthoinstitute.com/doctors/orthopaedic-surgeon-petrosini/
We have known Dr. Petrosini (Anthony to us) since he was in grade school with our son ... Along with being an excellent surgeon, he is also a really great guy ...
After med school, he received a fellowship to the Harvard University/ Massachusetts General Hospital Fellowship Program. He worked with the ortho team as assistant team physician for the New England Patriots (when Bill Parcells was coach and they went to the SB with Drew Bledsoe), Boston Bruins and New England Revolution soccer team.
If you do contact them, make sure to tell them you were recommended by Tony Madalone ...

Best of luck with whatever you do ...

PS I did not have mine done by Dr. Petrosini because I was already living in RI, and a 4 - 5 hour drive to a doctor's office wasn't practical ...