Every time I use these compact and brilliantly clear binoculars I'm amazed by them. The image stabilisation facility just seems like black magic - it's a bit like something out of a Terry Pratchett novel, where there would be a small and grumpy imp trapped inside the mechanism making it all work.
The image is bright and clear, and stabilisation means that you can see detail that you wouldn't see with much more powerful conventional bins. For instance, you can track a bird in flight with ease and still see the detail, which can be difficult with traditional lenses.
Small minuses: a little bit of fringing on the image, much as you see on some digital cameras, and for some reason there is no means of covering the front glass, which is odd for such expensive items.
Minor carping however, as these are a great product. I don't find the weight an issue, although I'd imagine some might. And you do need a battery for the IS, but so far the original has lasted me months.
Overall, outstanding and well worth the expenditure.