I have the R2 and it has worked great for the past 6 months. However, the anodized finish can come off easily when on a keychain. I just keep it now in my desk drawer at work as a spare light when I need it.
The light is also very white looking, but slightly more blue than my LD01 or iTP A3. Great light, but for the price of the E05, there are some other lights I'd rather get for about the same price.