It's been said a million times before on Amazon, but this product satisfies the common cry 'you get what you pay for'. While bright and contains all the basic features, this product is not durable. I could not fit the rear light to my seat post as the fitting was not large enough, and so decided to clip the light to my rucksack. Big mistake - the plastic the clip is made of is very low grade and simply broke when I tried to remove it. As this clip also secures the rubber on/off switch, which then came loose, I now no longer have a rear light.
Front light is still performing, but like another reviewer, I am suspicious of the waterproof claims due to lack of rubber gaskets (it's not been soaked yet). I have since bought the Canyon LED front and rear set (which I later discovered is also cheap here on Amazon!), but was at least able to inspect it at my LBS, and the rear light seems to be of a higher build quality. But we'll see........
If you're on a mega-tight budget, and you can clip the light to your bike using the provided fitting, then this may be OK. Otherwise, look elsewhere.