Naos 5000 owner here as well. My mouse wobbles on completely flat surface, ie. unusable on icemat (steelseries experience-i). Then I bought the Propus 380 mousepad (middle has become smooth, light signs of wear), and the my mouse does not wobble. I think because of the Propus380's semi-thick plastic surface material, it has some elasticity to it which nulls the wobble-ness of the Naos5000 mouse (apparently uneven base).
I have owned my Naos5000 since Jan' 2011, and the mouse wheel started squeaking since the first month of use. I temporarily resolve this by setting the "Scroll Speed" to max, which is 6 in the Mionix software, and when applied, Window's Mouse Properties shows the mouse wheel setting: Vertical Scroll per notch, 10 Lines. This forces me to go slow with wheel, notch by notch at a time instead of rapidly scrolling. For more accurate or quick scrolling, I can always just click and drag the side scroll bar.
And whenever I apply changes in the Mionix software, the applications locks up. If I really wanted to keep changes, I would have to Exit the software in the taskbar, in Windows Task Manager> End Task "Naos MONITOR" (this prevents clean reinstall of software I believe), Control Panel>Uninstall Programs>Mionix software... restart, install Mionix software, Apply all my custom changes again. Then it finally saves. -Alternatively, there is an option to export file of your saved configurations, then you would just have to import after the reinstall. Quite the hassle, but works from my experience.
I have sentimental value towards my mouse lol, therefore I have no intention of ridding it. I also have the up and down buttons to switch through profiles 1 to 5, each profile with its own three different DPI and its own lighting color. The result is blue, green, yellow, orange, and red light schemes, with technically "15 on-the-fly dpi settings."
very content with Naos5000.