These lights are absolutely packed with options!The headlight has several practical features,my favorite being low level light with bright strobe,perfect for road riding. The 3 solid light levels plus the boost level are ample for fast downhill mountain bike riding. I have ridden off-road at 25MPH without reservation with this on my helmet and another light on the handlebars. The strobe modes are visible and attention-grabbing in daylight. At night, I angle the strobing light downward, as to not blind oncoming drivers, riders, and pedestrians.The digital display is easy to glance at while in motion, with its use of icons. Having remaining battery percentage is invaluable for determining when to start reserving battery life or switch to a fresh light. When charging, it is also easy to see how full the battery is, if you're trying to quickly recharge before an impromptu ride and when you just plain forgot to recharge.The headlight also has non-riding rwatures that are great, such as a low light walking mode that lasts 15 hours. The SOS strobe will work well when in a pinch (I hope to never use it!) Boost mode can be enabled easily with a double-click. As always, this Lumina light is lightweight and compact.The tail light is fantastic. The primary blink pattern is a perfect balance of safety and battery conservation. This has alternates dim and super-bright LEDs: "blink blink **KERPLOW!**" That bright LED is quite visible in full daylight.CONS:Nightrider Lumina headlights take time to recharge. It would be nice to see a 2-amp fast charge feature. Also, the headlight has three buttons. These are awkward to navigate while mounted on a helmet and trying to make an adjustment while in motion. This light obviously heats up more than others in the Lumina series, especially when blasting out all 1100 lumens,so be sure to keep the heat sink well ventilated. Finally, the button on the tail light is small and difficult to press, BUT I'd rather have this minor inconvenience than have a larger button that can easily be pressed by accident and affect the water-tight integrity of the design.Bottom line: This is the best value available at time of my purchase. The headlight is very bright, loaded with features, and actually fun to use. I feel safe with this tail light in any situation.