I just want to talk about this product that I recently bought at AmigaKit.
. You plug it in and the mice moves smoothly. Later just installing the drivers and rebooting you've got scroll with the mice wheel. It's true that AmiKit Real is already configured with FreeWheel, so I've made nothing to have the scroll working appart of the Micromys drivers.
I think this product has very few publicity (Jen isn't posting here daily links to Ebay like others do, and the last post here was 2 years ago).
Conclusion: Marvellous device that I recommend.