My opinion of the light just improved and improved.
First of all inserting the batteries is easy: clearly labelled and the top fit firmly and feels secures and lasting.
Fitting it ti the bike is a dream with the hosepipe-like clip: it slips on easily, sits securely and is easy to adjust. Much better than anything else I have seen, and needs NO TOOLS!.
Then the light... In use, this is perhaps the most well thought out light I've used, though that might not strike you that way immediately.
To on or off, simply hold down the nice rubber on-off switch for about three seconds. Cleverly, it turns on in the same intensity that you last used.
Click once again can you change the intensity of the light.
Now the really clever part: Double-click (like you would do with a mouse button). Now, just like the clickety-clack you just did the light is flashing! Touch once to return to solid beam.
It's just a really nice thought out light: An exemplary, Apple-like attention to detail,