I've been excited for it for as long as I can remember, I've followed it closely for most of my life. It was so valued by the scientific community before it even launched that when the Ariane 5 rocket that would carry it into space was being assembled they binned all of their components so they could ensure that this rocket was as high tolerance as possible. Sure any part off their shelves would be within tolerance and probably would have been fine, but they took the extra care to seek out only the best of the best for this launch. It's likely that JWSTs service life was increased by this extra care since the rocket was able to place it almost perfectly on course with very little correction needed.