Well I installed my Magic Blinkers the other day and I'm very pleased with them! I now have running lights that add a fair bit of safety to my bike for little effort and not much cost. They were fairly straight forward to install and the instructions that came with them are easy to understand. It took me about an hour to install and anybody with half a sense more in electronics or mechanics could probably to it faster.
A couple of points I came across in my installation:
1) I need a load optimizer as my blinkers now blink twice as fast, not a big deal though.
2) I found a great use for those extra lights to the sides of the headlight, they became my constant power source for the Magic Blinkers. Plenty of wire to work with and since the power wasn't being used I figured I'd tap into them.
3) Get some Posi-Lock wire connectors like JustWantToRide suggest. The Magic Blinkers come with some crimp connectors but don't seem very secure for the long haul. Also you may want to pick up some click together connectors like the ones that already exist for the blinker lights so you can re-wire them and do a proper job.
I'm definately going to re-wire everything with some better connectors and add some wire to lengthen some of the connections. I was excited to get them in and see if they worked