In my opinion only the Leica can compete with the Swarovski in image sharpness. But Swarovski is easier to mount a camera for digiscoping. This is the Tiffany of nature telescopes. If you're a serious birder, it's a lifetime investment.
Pros: Superb resolution and color fidelity; zero abberation
Cons: It's not cheap, and it's a bit heavier than any cheap scope
This review was written in the old system and had content requirements that are different than reviews written today.