[JimD]

Looks fine to me. The only way you see an appearance difference is if the pads are riveted (instead of bonded) and wear to the point the rivots touch the calipers and wear grooves into them. Normally the most sensitive thing about brakes is stopping and noise. I once put a pad on backwards (not very possible on my bimmer) and the car would still stop and the rotor looked OK but the stopping distance was long and it made some noise. I could tell it wasn't right. We took it apart and found the backwards pad. I could have just put it back together and I'm sure it would have been fine but it was my step daughters car so I replaced the rotor.

It is possible to make some pretty bad mistakes without the car becoming inoperable, in other words. If it isn't making bad sounds and stops like it should, it is very likely to be fine.