I've had the P7 torch for over a year and it truly is a fantastic torch. To avoid paying loads for a specific LED bike lamp I ordered one of these.
The mount is made up of two parts, a plastic clamp (with nut and bolt) to attach to the handlebars and a rubberised section to grip the torch. The problem is the two parts are riveted together and mine arrived with far too much play between the two parts, as a result the torch and it's beam shakes and shudders constantly, the torch did not fall out but the light was a migraine waiting to happen. I should have returned it straight away but it's more hassle than it's £15 value as I live in France. I will try to glue the two sections together and bin it if that doesn't hold. Maybe mine is a one off dud, I do think using a rivet rather than a nut and bolt is a flaw though.