Have had both done, done the rehab, walk 3 miles a day and can tell you after 2.5 years latter your life will change, some for the better, some for the worst. Legs will never bend the same as factory direct, If you can get by with what you have now I suggest you go till you have to crawl. If you talk to 10 people that have had it done you will get 10 different responses to how their doing now. Steps, ladders and things like putting on your under shorts, not to mention sitting on the toilet will take a new effort. No such thing AS FREE LUNCH and please believe me when I say nothing beats what the GOOD Lord makes! NOTHING!