Yeah, I've got one of those too (though note they don't actually give you the option to buy it, so I suspect B&M have realised it's hopelessly inadequate and have replaced it with the newer one), which I used for all of about 5 minutes then decided it was vibrating so badly that it was going to suffer self-untapping screw failure at a really inconvenient moment. I continued to use it with a Smart Polaris[1] 2AA light for a while (which is both lighter and a lot cheaper), then got a proper dynamo setup and needed the fork crown for a Cyo.
The handlebar bracket also has a single critical self-untapping screw which will work loose eventually, but there's a lot less scope for vibration.
[1] Handily, the Ixon and Smart brackets are compatible with each other. If nothing else, it makes spare handlebar brackets easier to come by in the UK.