depends on the kind of pain, I think. My good friend who I did a detox cabin retreat with for a month this summer went back on kratom after a while when we got back, because he says it totally eliminates his chronic low grade back pain. Without it, he takes 800mg of ibuprofen 4 times a day, and it still bothers him. It's not really severe pain but it's the kind of pain he can't ignore and it makes his quality of life worse. He says that kratom makes it disappear entirely so he wants to stay on it.
Personally I don't notice a lot of analgesia from it, unless I've taken a lot of it, then it can make me kind numb (and reduce sensation in my skin too).