Lights

I've got a set too - reccomended - be sure to get a USB kit with it though, I burned through about a tenner's worth of batteries before I thought a USB might have been worth it. Got one now. Smashin'

Agreed. I only have the battery charger ones which are useful if you're nowhere near a computer! The lights are extremely bright for their tiny size but they need to be charged regularly. The battery you charge from also makes a huge difference.
A further thing I'd like to criticize is the velcro strap. While it's a good idea, I find the strap too long so I have to fold it over to avoid the excess strap blocking the beam. Also, it's weak. I've snapped the two straps I had just from tightening them and have now resorted to using elastic bands.

If possible, get the front and rear individually, one with a USB charger which will be more reliable, and one with the battery charger.