Same here...just today I ordered a second SuperFlash, to be mounted low on the left seat stay (the current one is on the seat post).

My only minor quibble with the SuperFlash is the fact that it is not "infinitely adjustable" for aiming in the vertical plane, due to the "cogs" on the attachment bracket. On my seatpost mount it's either aiming a little too high, or a little too low, depending on which cog I select. Regardless, it's bright enough to get the job done, and with two I should be highly conspicuous day or night.