I have the e+lite and several photons. One on my keychain as well. I EDC the e+lite. Love it. If your looking for something in the Tika/e+lite headlamp range I highly recommend the e+lite.

Many have questioned how durable some parts are like the swivel and the cord lock. My five year old is like the Samsonite Gorilla and it hasn't caused one issue on either part.

It can fit on your head with or without a helmet, around your wrist, tied to an object. It has multiple light settings that make a lot of sense with a great 'Lock' function.

It is certainly not a primary headlamp. If your looking for a quick light for finding something that dropped, the photon on a key chain has faster deployment. If you need a light for darkened reading or movement, hands free options and multiple functions, e+lite is awesome.