I use almost exclusively bushnell, mid to higher end lines.
I can walk into the warranty center and walk out 10 minutes later with a new scope, otherwise at most a few weeks free of charge to my door if they don't have it in the warehouse. I've heard shipping adds a noticeable amount of time into the process.
It's been argued that a better made product would not require the warranty in the first place.
Sure...maybe. I'm under no illusions as to the quality difference between a Bushnell DMR2 and a S&B PM2
But having a product that is lifetime warrantied no matter what, definitely reduces the risk when buying used scopes. One can buy a bushnell or vortex, sight unseen, and not have to worry about if anything's wrong with it short of it being bent in half lol; they're going to replace it.