I bike commute almost everyday, so well designed bike accessories are a must. The U-Lock is a brilliant piece of design. It’s much more secure than a traditional chain, attaches to a bike to be easy to carry, and lately comes in interesting colors. I love this particular piece of design because it is so singularly focused.  It serves exactly one purpose in life- locking a bike frame and wheel to a bike post- and serves that purpose perfectly. You can’t lock much else with a u-lock, but it fits perfectly with the daily routine of bike use and requires almost no brain cycles to use. I think it’s a great example of brilliant, focused design.