Both knees feel great; the pain from my most recent surgery is mostly gone, although if I stand in one place too long it complains a little. That leg, which had the multiple surgeries, is now my weaker leg for awhile as I rebuild its muscles. It was my strongest leg before; and this change can affect my balance a bit but only for certain movements; I've never had a fall but have to be mindful of this while in this strength-building phase (full recovery takes about a year). My legs are now straight (I was quite bow-legged) and exactly the same length.