I persevered with the holy hand grenade for several years, I had the LD1000 and the LD1100. I ride every day, in all weathers, through heavy traffic, I gave up with them:
a) Mounts are weak. In cold subzero temperatures, they're prone to snapping, either the band or the mount itself. I've had several go skittering down dual carriageways. Its the same mounting system as their other, lighter, lamp units, design error IMO.
b) The LED units themselves are not very bright. They look bright when you look at it close up, becuase the unit plastic illuminates, but they're blown into the weeds by more modern LEDs like the one used inthe smart 1/2 watt. Even the newer 'brighter' LD1100 isn't that good in comparison.
c) The two rows of LEDs, when both are set into flash mode, go in and out of phase with each other, so if you're further back than about 50 yards from the lamp unit (like a driver) they don't appear to flash at all. One row solid one row flash isn't as noticeable as a more modern unit on just flash.
d) Battery life. I use decent rechargers, becuase the unit is driving so many leds, rather than one effeicent LED, brightness dropoff is horrific. This means a couple of recharge cycles a week, rather than one for smaller, brighter, more effecient units. It is easy to get the batteries out, tool-less, but *once* (not if) its gone under a car it'll be more fiddly.
They are robust; however, they still sustain moderate to severe damage when they go skittering under a transit van, or Vauxhall Cavalier. They are weather proof, and they do have dedicated side illumination.
I use a smart 1/2 watt, it has much reduced side visability, but it is MUCH MUCH brighter, no phase issues, excellent battery life from 2AA's. Weather resistance is not so good, its OK if you have mudguards, but water can creep in if you don't have them, easily solved with some sellotape around the base to deflect the water. The mount is much more robust, as less strain is placed on it. It is also VERY cheap. They're so good I'll buy another this winter.
http://www.chainreactioncycles.com/Models.aspx?ModelID=42472
I also have a Blackburn Mars 3. I got it initially as it has some side visability. Its not that bright outright, I'm not convinced the weak side LEDs add that much, and you need a jeweller's screwdriver to get the batteries out (WHY?). It is v weather resistant and again, the mount is much more robust.
I run the smart on the back of the bike, and the Mars on my courier bag.