Hi all,
i was about to pull the trigger on a pair of 10x42 HD Conquest by Zeiss and was advised against it. Apparently ADs have been seeing lots of issues with their stuff and they don’t honour their warranty either??
Has anyone else heard that?
Ziess are a massive company with a very diverse portfolio (read here for more corporate bumf
ZEISS Gruppe), in terms of size and markets they are beyond comparison with Swarovski (who make good glass but shitty diamonds, according to a friend

).
Swarovski Optik, unlike Ziess, still have a family member involved in overseeing their operations. I've not been to their facility but the dealer who I used to do some promotional work for did, and they are best described as the Maranello (think Ferrari) of the optics world.
All the major Euro brands (Ziess-Various, Leica- Portugal and S&B-Hungary) now farm out production of their 'low-end' products. In the case of Ziess I believe their items are either produced on contract or even re-brands in some cases, most coming out of the Far East. But I believe their 'halo-tier' optics are still made in house.
You
should be fine to buy the HD Conquest by Zeiss, but
only if you really like them.
My recommendation for buying binoculars would be going to an authorised dealer and trying all the top brands. For example, I can't get on with Leica binoculars as I believe their design suits people with smaller hands. Their glass is top tier but with every pair of bino's your image quality is going to be limited by your ability to hold them steady, unless you are carting a tripod around I would not make glass quality your ultimate determining factor.
I bought my binos (Swarovision EL 10x42) from the same dealer in 2014 and made my decision having compared the best of Leica, Ziess and Swaro. Since then my binos have been in for a refurb/service twice at no cost to myself, all wear was related to travel and competition use. The service was top class, can't say for sure about the other two makes but the dealer said Swaro were always the most straightforward, anyone who has had to email them for new eyecups will know this

.
Whatever you choose, I strongly encourage you to buy from an authorised dealer (as in listed on the company website as an authorised retailer distributor, not a stockist/reseller who claims to be one). Any problems (not saying there will be) and you have the original receipt and bill to back you up. Better safe than sorry, and if you are trying to save £50 or less on a £1,000+ pair of binoculars by shopping around more questionable avenues I would have no sympathy if you encountered problems down the line.
That being said, if you do decide to buy secondhand, make sure the seller is the original owner (with proof of purchase). Don't expect a free service from the manufacturer either, and if you do get one it is down to their charity and not your shrewd negotiating skills.
Personally have never bought Ziess, despite having access their binoculars and spotting scopes for tests. I would always buy German/Austrian and preferably from a company who keeps their production in house, so Swaro ticks all the boxes for me. I own some Leica stuff and S&B scopes, all faultless so far (apart from a PMII turret not working out of the box, which S&B rectified and returned in under a week but took a certain dealer two weeks to 'test & confirm'

...) but they have not had the same miles my Swaro gear has.
All the best.