Thanks for asking, for indeed I have. For folks who buy a small bin (pocket bin) to be small and light, the Leica 8x20 Ultravid is a better choice as is the Zeiss 8x20 Victory because both are much smaller than the Swarovski 8x25. The Ultravid has a superb focus knob which allows holding and operating them much like a full-sized bin. Both have superb contrast and glare control. I've found few situations of walk-around type birding (as opposed to hawk flight, sea watching, or other long distance viewing) where they don't do the job. I wear glasses and find both very comfortable with respect to eye relief, and because I wear glasses the eye cup diameter is of no importance. If I'm willing to carry/pack something bigger, I'd choose something with better handling characteristics than the Swarovski 8x25, such as one of the compact 8x32 models (e.g. Leica Ultravid, Zeiss FL, i.e. not a bulky model like the Swarovski EL). For folks who own full-sized bins and don't already own a compact 8x32, the 8x25 might be an attractive alternative to acquiring both or either 8x20 and 8x32 bins to meet a desire to have a compact/lightweight bin. If that were me, I'd still be disappointed with its ergonomics compared to, say, the Swarovski 8x30 CL.
--AP