really top notch and surprisingly easy to handle. we did some tests earlier this year. generated some panoramic images via modo using a spherical camera. krpano tools took care of the whole conversation process ( cutting into cubical maps, etc...)..there are different plugins to deal with ui and interaction.
If you need to change product colors, and Flash is not an option, I'd go for a jQuery solution and hire a developer to add in the features you need. It shouldn't be hard.