I used my Swarovski 20-60 Zoom Eyepiece in combination with my Swarovski 65mm Angled Spotting Scope and the combination was awsome. I've never seen clarity like it before and certainly will be surprised if its surpassed in my lifetime. This is a 'top of the line' quality piece of kit. All of it's operating components are smooth as silk and the optics are absolutely faultless. Mind you, nothing less than I now expect from Swarovski.
Pros: Clarity, easy to install and use
Cons: None I can see
This review was written in the old system and had content requirements that are different than reviews written today.