Prior to the release of the Z5+ series the primary criticism of the Z5 series was that although lightweight and crystal clear, it was not rugged/durable and that the turrets did not effectively track and consistently return to zero. IME Swarovski has effectively addressed these concerns with the Z5+. Just about everything in the scope was updated and thoroughly redesigned - the body, turrets, erector system, and even the optics were updated (now even sharper than the Z5). I own the Z5 and the upgrades of the Z5i are immediately noticeable. After shooting it over the course of the past 6 months or so I was confident enough in all of its features (including tracking) to take it on a Yukon Fannin Sheep Hunt (could have used any scope I wanted). It proved itself in the field as well. What really impresses = they made all these improvements and kept the weight ~20oz. Bought this scope for hunting mountain game for which it is very well suited.
Swarovski’s done a great job on addressing hunter’s primary concerns with their hunting scopes with the new Z5+ line. I’ll be using it on the majority of my hunts for the foreseeable future.