These lights are highly recommended.
The quality of light produced from the LED bulbs is quite intense, ensuring maximum visibility to other road users.
The rear light has a variety of settings, ranging from all five LEDs illuminated at one time, to a variety of 'flahing' options. The front light is either continuous or flash and produces a good cone of light. If there is one very small criticism it is that the top of the front section of the front light is clear; the light showing through it can be a distraction if the unit is affixed to the handlebars. However, this is easily overcome with a strip of duct tape or similar.
Attachment to the cycle is very easy and the quick release facility permits removal of the lights to prevent pilferage. The lights are small and light enough in weight to easily pop into a coat pocket or bag.
All in all a very good buy!