We did a focus group this weekend at the GameXpo. We took a handful of ipods loaded up with Space Trader to see what people thought. Overall the response was very positive, people took to the controls quite naturally and had no problem running around the levels. For most gamers it took less than 15 seconds on their own to get proficient with moving around.
We found some other minor issues, some lighting tweaks need to be done but for the most part its ready to go.