I know all about them, MC. What would you like to know?
He's very young to need that surgery unless he had a bad injury in that area or advanced rheumatoid arthritis. The ortho surgeon is almost always going to operate since that's how they make a living.
My experience has been this after taking care of hundreds of people who have had total hip replacements.
1) People in their 60s and under generally do very well with the surgery and recovery as long as they do not have comorbidities (such as diabetes, cardiac problems, circulation disorders, etc.).
2) Mixed results for those who are elderly or who have comorbidities.
3) General: he could possibly have weight bearing restrictions such as only being able to touch his toe down or possibly non weight bearing (those really suck). There are several "hip precautions" he will have to follow so as not to displace the joint after surgery with the biggie being to not create a smaller than 90 degree angle with his legs in relation to his torso (sorry if that's confusing, hard to explain without giving a visual example).
Give me some more specifics, and I'll answer. A total hip replacement compared to a total knee replacement is much less painful. I would say it's probably the least painful of the elective total joint replacements except maybe a total shoulder (but those are a real pain with the arm immobility).