Bought a couple of the bike lights in Aldi's special stuff for sale event this weekend. A little larger than my 200 dollar fancy lights but the brightness seems to be very similar, cant comment on the battery life yet.
Would need something stronger for mtb rides but did the job blinding drunk bogan kids on my jaunt along the bikepath last night.
It sits okay on the handlebars but definately liable to move around when the terrain gets gnar.
The front light is pretty much an LED torch, im going to keep one in the glove box of the car, replace the old headlamp.