I got my Gerber Tempo in April 2009 and have carried it on my keychain until this week (August 2009) when it became too unreliable to trust.
Although there is much I like about the Tempo, I cannot recommend buying it because it is less durable than it should be due to a fundamental design flaw.
The Tempo’s design flaw is that the LED is too exposed. The tip of the LED is flush with the end of the flashlight which virtually guarantees that other items in a pocket or purse will push against the LED. This flaw caused my Tempo to break after four months of light use. I have to wiggle the LED to get the light to come on. Sometimes a slight wiggle is enough, but often I have to play with the LED for 10-15 seconds to get it to come on and stay on.
Other users/reviewers have experienced the same problem with their Tempos.
If the LED were covered or recessed more deeply (like the LEDs in the excellent Infinity model) the Tempo would be a winner.
On the other hand, if you plan to store your light where there’s little chance of other objects
rubbing against the LED the Tempo might serve you well. It puts out a decent amount of
light for its size, has a solid feel, and uses readily available AAA batteries.
For now, I’ve replaced the Tempo with a similar-in-size Dorcy flashlight. The Dorcy is cheaper, feels cheaper, has a lens cover and seems to be about as bright as the Tempo.