This would have been a great tool to have when I was learning to model for 3D. It's not quite all there yet but eventually I see this being real useful. If you don't have a 3D printer and want to test your designs this is a good tool to start with. Features I would like to see is a warning that your part is getting to thin to print effectively, where there are likely to be gaps because of that strange thing that happens where the nozzle can't get in to fill in a part, and more configurable options like the ability to change layer heights. I'm not quite sure what the point of the "CO2" option is because on the 2" miniature I tested it told me it had the carbon footprint of 6 Bananas, 12 Cokes, or 9 BMWs. I kind of feel like I stumbled on someone's pet project before it was done, but this does show a lot of promise. I look forward to seeing this wrapped up and useful.