I also have a 30X Swarovski eyepiece for my 65mm HD scope. This eyepiece is also superb but the availabilty of the zoom makes the 20-60 eyepiece the one I use most often.
Pros: Superb optics, zoom capabilty, waterproof design.
Cons: Not a one.
This review was written in the old system and had content requirements that are different than reviews written today.