I got one from Smudge about 4 weeks ago and it is superb for the money. I have a Trout Lib3 on the bars and the xml on my helmet and the amount of light is superb. I wanted quite a spotty light on the helmet and the xml does this perfectly, but also has a good amount of spill around the central spot.
The battery is lasting well, after a 1.5 hr ride on med/high it only takes 30 min to get back to fully charged, so can’t have used a lot of the battery.
One thing to note if you want to use it for running/walking is that the cable is quite short and will not stretch from a belt mounted battery pack to a head mounted light. Mine only just reached from my rucksack top pocket to my helmet mounted light unit. If you ask nicely then Smudge can probably make you an extension lead to be able to use it with a belt mounted battery.
Other thing to note is that flashing mode is on full power and as such is not really usable on the road unless you want to cause a few crashes 😉 Would be superb as an emergency signal though.
A very good light for the money