From time to time you do see Zeiss offer pretty good rebates on their 3-9x40. I think Zeiss makes very clear and bright optics, but I wonder about their durability or their service when compared to Leupold, Swarofski, or others. It's because of the very unhelpful service I recieved in dealing with Zeiss customer service.
My Zeiss binos fell off the bench while I was target shooting one day a while back and they were fine, but out of curiosity I called Zeiss to ask them what type of shock-proofness is build into their binos. I mean I could not find a thing on their website about their binos being shock-proof, any good brand should at least comply with a drop test rating in numbers of feet. All they would tell me is that they are not indestructable and if I'd like to send them in for evaluation I could do that at my expense. Pay shipping and a service fee for them to look them over?? I don't think so! No matter how simply I explained to them that I'm looking for a simple answer to a simple question, they would not give me an answer. All they continued to say is that the binos are not indestructable, to which I kept replying that I understood that, but that's not what I was asking them. They even had one of their technical engineers call me back to no use, all he did what repeat what the reps had been telling - they're not indestructable. Yeah I get it! It's as if they thought I was going to try and make a warranty claim on something that was my fault and they were doing whatever they could to cover their butts so they wouldn't have to cover anything for me free of charge. I wasn't asking for anything except a simple answer to a simple question. I made it very clear to them that I was not seeking a warranty claim, just simply looking for drop-test info or shock-resistance information about their product. I had no intention of sending those binos in and they are fine to this day.
These are the only Zeiss optics I own and are pretty good glasses, but I don't think I'll ever spend my money on a Zeiss product again. It was very clear to me from dealing with them that once they have your money they'd rather not help you with anything, let alone have your back in the event that something should really happen. It's obvious to me by the way they handled my simple question that if I really ever needed to make a legitimate warranty claim due to defect they'd probably do what they could to get out of having to uphold their end of the lifetime warranty.
I have never had to use Leupolds warranty, but I have called their customer service a number of times with various questions and have always been greeted with a friendly and very knowledgable customer service rep on the phone who will answer all my questions thoroughly. Leupold seems to be a damn good solid company who actually still cares about their customers long after you have given them your money.