I'm a big fan of this.  It's very small (think 1985 Sony Walkman size) but doesn't feel fragile.  The stand is sturdy and it's designed to easily hang off of various hooks, ropes, etc.  There is only 1 button.  Press it once and its on the brightest setting.  Each additional press lowers the brightness one level, with 5 clicks to turn it off.

The brightest setting is extremely bright, it easily lights up a 20 x 20 room if you point it at the ceiling.  I think this is something that everyone should own in case of a power outage or more serious emergency.