Was watching this TED-talk with a ME, http://www.ted.com/talks/amos_winter_the_cheap_all_terrain_wheelchair.html
Towards the end he presents their epiphany that the user is really important!!! GASP! 
They went out with their prototype and it sucked because X, and then second prototype sucked because Y. Insight: user input is super important! All I could think was jesus, a designer doing a week of field research and some sketches could’ve saved you guys about a year of dev time… 
Sadly they turned to design late when it was time to snazz up the developed-world version… and made it look like the usual moving-fast-when-standing-still crap… opinion
Disclaimer: not slamming the project, it’s super cool, but seems like they would’ve benefited alot by having more knowledge about design.