Never miss a beat, reliable GXP BB, sometimes available discounted.
Aluminum crank bolts and chain ring of medium quality, better changed to cro-mo bolts and CNC chain-ring after they wear.
My second set, although my first was a 3 ring version. Last for years, no maintenance ever needed. I would consider upgrading to a ceramic GXP BB, CNC chain ring and cro-mo chain ring bolts