Well, I also get ECO600 as a gift, yesterday.
While it is very nicely designed product, there are few issues I had to deal with. First is dropping connection (common problem), which I solved by connecting receiver on usb extender cable, away from comp case. The second is quite unresponsive and unprecise pointer movement, probably due to my (almost glossy) wood surface, and as I'm graphic designer, this is very annoying.
However, the issue I came here to report, is that after SIM installation, I can't run it at all (Windows 7 Pro 64-bit).
I tried 1.0 and 1.1 versions, and neither one works. Uninstalling, cleaning registry, reinstalling, running as admin, nothing works.
Any solution?