Negligible. I walked both the Detroit airport and the Atlanta one without assistance the 2nd day after surgery. Sure I took pain pills, but it wasn't even near the scale of my FFS. As long as you take the pills when needed then it isn't a big deal. I detailed my experience in my orchi thread.
Given that I have a slim chance of before end of year surgery or much more likely an even longer plan than I originally estimated (5+ years) I'd definitely do it again.
I've been able to change all of my documentation that I will ever be able to change with just the orchi too.