I purchased the Kowa 883 and the Kowa zoom eyepiece together after looking at all the scopes I could and reading all the reviews I could find. Since the 883 was a new scope, there weren't too many reviews.
My overall comment is the same as that of most people who look thru my scope - WOW. Resolution is outstanding from edge to edge. The dual focus knobs are smooth to operate. The zoom eyepiece is also very smooth and focus stays sharp throughout the zoom process.
I bird with the scope and there are always people wantint to look through it even with the Swars, Zeiss and Liecas around.
By far the best scope I've ever used.
Pros: sharpness, smoothness of focus and zoom
This review was written in the old system and had content requirements that are different than reviews written today.