Hope it works as advertised, have one on the way.

After reading about everyones experience with the Flash2pass I decided to put one on my FLSTSE. It does not fit in the headlight and the wires are a tough push through the headlight harness (even with a small stiff wire for a guide) so I just drilled a hole next to the harness hole the correct size for a grommet, shrinktubed the wires for the transmitter so they would have a snug fit through the grommet, and zip tied the transmitter to the forktube behind the chrome steering column cover. I am not worried about the wire taps as they are "Posilock" taps. I have been using them in auto applications for years and never had a problem with them, and the new taps (in this kit) work without cutting any wires. There may be issues since weather may get into the nacelle but it seems to me there would need to be a lot of water laying in the connector for any problems to develop.
 I had an issue with the receiver not having the proper power from the garage door wall mount doorbell button. I called Flash2pass and they told me to get a wallwart power supply as specificed in the directions (9 to 36 volt with a 1.3mm ID center positive plug) but the directions do not specify the amps or milliamps to use. I have that info at home and will post when I get home..<sorry! my memory is not the same as it used to be >  Anyway, I went to Radio Shack and bought their Enercell­ 9V/300mA AC Adaptor (I THINK) and use an Enercell Adaptaplug with the 1.3mm ID (Inside Diameter) center positive adaptor for the end. (polarity depends on which way you install the adaptor to the power supply).
While on the phone and since I was keeping the original doorbell button to open the door since it was a multifunction unit, Flash2pass recommended attaching the receiver at least 10 inches away from the actual opener, near the ceiling, with the blinking LED facing the garage door. They indicated it would potentially receive a better signal there because it is closer to the garage door and on or near the ceiling whereas most of the doorbell buttons are near the back of the garage close to the garage entry door to the home.

Hope this is clearer than mud and helps someone out there! I will post the milliamp speck of the powersupply...I KNOW it is under 1000 milliamps... I think it was 300 to 500??

Mine was powered just fine with only the power from the opener. I guess it depends on which model you have.

MikeV

I put the Flash2Pass unit on my non-Harley bike a couple of weeks ago.  My 08 SEUC came with the HD unit pre-installed.  They both work great.  The difference is the price. 
So far, based on my experience, I recommend the Flash2Pass unit.  I am actually thinking about putting them on my car and truck.