I have been in the business for about 5 years and much of my work has been large projects, only some simple products have yet made it to market.
The most successful design I consider the Solar Car I co-developed with the team in Eindhoven, since it won the race and several awards.
It just got featured on the front page of Coroflot:
http://www.coroflot.com/zoontjens/Solar-Car-Stella-design