I had an ankle replacement at the end of December 2017, and so far, I have been extremely pleased. *knocks on all the wood*
ETA some more details:
I put it off as long as I could, bc at the time, the doctor said it would be irresponsible for him to do an ankle replacement on someone my age, and bc of my active lifestyle, he didn't think I would be very happy w/a fusion. He did an ankle distraction, knowing it wasn't a permanent fix, but it did buy me several more years.
But, I "lived w/it," much longer than I should have, to the point where the ankle was about to roll off the joint. (Apparently, that can actually happen… But, it's usually in very old people, late 80s or 90s.) He said younger people were doing well w/replacements now, and we scheduled it immediately. He put an external fixator on in September 2017 to pull the bones back in alignment - It looked crooked, like a traumatic injury, but it was from the arthritis. The bone-on-bone had caused the bone to erode to that degree. Then a couple of months later, he removed the fixator, and about a month after that, he did the replacement.
Dr. William McGarvey did mine as well - I can't recommend Dr. McGarvey enough!