Knee replacement experiences

[MS Fowler]

I am finally scheduling total replacement for both knees shortly after the New Year. Exact date unknown because "the book" isn't out yet.
I'd like to hear from those who have had total knees. How did it go for you? I am expecting to be up in a day. Return to work will depend on my being able to drive and no pain-killer drugs-- 4 to 6 to 8 or 12 weeks.
I am a construction inspector, so ladders and scaffolds, and jumping down into footings is all part of the job.
Knees have been bone-on-bone for years. I have been getting injections for years,too. Plus, the surfaces are gnarly from arthritis.
Time to get them replaced!!