I haven't had too many service issues with scopes, but the ones that I recall having sent in - Leupold, Simmons, Bushnell, and Redfield, were all handled extremely well. Leupold, Simmons, and Redfield (the old, original Redfield) to my mind, all went way beyond the call of duty and exceeded my expectations. Leupold returned a scope rapidly (air freight) in time for hunting season, Redfield actually built a special scope for me as they had changed a model from one year to the next and I wanted the old style, and Simmons replaced something I purchased incorrectly with a better, more expensive model at no charge. I guess I should add Jason Empire - my first binocs from almost 40 years ago, that they fixed for free after my buddy dropped them in a duck blind.
Maybe I have just been lucky, but I have gotten the impression that optics outfits, as a group, seem to give very good service. Leupold does a great job, but so do others!