A friend at my club had this done (he's in his 70s), plays three times a week and runs daily. He says that it feels great. He's in really good muscular shape too.
I didn't ask him about pain but I don't think that he would be as active as he is if he had a lot of pain issues.
4 x IG Prestige MP, 70 cm, 376 grams, 386 SW, ALU Power @50