This is my second Cygolite headlight. I purchased aCygolite Metro 420 this spring, and it's performed so well that I decided to buy another which I could mount on my helmet or use on my wife's bike. Unfortunately, the 420 has been discontinued, so I decided to try the 360; in practice the lights have proven to be *very* similar (which I'll get back to later). The Metro 360 is a very, very bright light. Since I typically ride where there are street lights, I find the medium setting to be totally adequate for most of my uses. The full brightness mode is really overkill if you have any ambient light, and I save it for completely unlit areas to conserve battery power. Despite its brightness, the lumen ratings on these things should be taken with a grain of salt; I can compare the "bright" mode of this light to a (nominally) 200 lumen flashlight and it's really not discernibly brighter than the torch. I find the beam pattern quite appropriate for bicycle mounting - it's wide enough to cover a reasonable chunk of the road ahead when mounted on the handlebars. With a single light I feel comfortable riding up to about 15 mph in the dark, but I wouldn't go much faster than that for fear of not being able to avoid unseen obstacles. For higher speeds I use one light on the bike and one on my helmet, and I can target the latter on the fly as needed (no helmet mount is included, though; I have rigged up my own solution as I await receipt of the officialCygoLite Helmet Mount for ExpiliOn ). Recharging is simple - use any USB port. A cable is included but a power adapter is not. You may use your PC's USB port, or use the cable with a charger from e.g. a phone for a quicker refill. Recharge from empty can take several hours, and a blinking green light under the power switch indicates that charging is in progress (it switches to solid green when finished). Since it's not totally dark during my commute, I often use the safety blinker ("Daylightning") mode. The battery lasts seemingly forever using this mode, and I can go weeks without charging when using this exclusively on my twenty minute commute. I've never had this thing run out of power during use yet; I just recharge it when I remember to, and it's always good to go. The only time I found it completely dead was after I had apparently left it on overnight. I've seen an 8 hour runtime indicated and I'd believe it. The mounting bracket is simple and effective. The thumb screw tightens and you can latch it in place. You can use the included spacers if your handlebar is too small, or cut some old tire tube and use that as a shim instead. The mounting mechanism allows the light to be tilted from left to right; if you have problems with the light shifting from side to side too freely while mounted, you can tighten the phillips head screw in the mounting bracket to make lateral movements require more force. The light detaches from the mount when you depress the retaining tab and slide it forward. Although I've not tested the 360 in the rain yet, I used the 420 in the rain a great deal. It held up in the weather just fine without any discernible issues and I expect similar results from the 360. One caveat: make sure the USB port is covered with the rubber stopper. If you don't do this water can get inside the light's plastic housing. The UI is good. Single press advances through modes, long press turns off while "saving" the current mode for power on. The sequence is: Medium -> Bright -> Low -> Bright with periodic very brief flashes (aka "Steady Pulse?") -> Standard Flashing (the typical on/off/on/off regular flashing, AKA "DayLightning?") The sequence of the 360 is identical to that of the 420. "Steady Pulse" is a somewhat unique mode which is almost, but not entirely, fully solid, so you can use it like a headlight without being blind for long during the blinks. *** EDIT *** I initially erroneously claimed that "walking" mode was absent, but I just didn't know how to activate it (instructions? WHO NEEDS INSTRUCTIONS!). As a commenter points out, you hold the button from "off" for ~1 second. "Walking" mode is actually identical to "low," but when in walking mode single press does nothing and the light only responds to long press (which turns it off completely). I'm not readily envisioning a use for this, but... there it is. *** END EDIT *** Four stars instead of five because: - the battery does not seem to be interchangeable - having a spare battery would sure be nice for extended trips, and being able to swap out the battery when the included one eventually dies would extend the usable life of the light. - no "battery death imminent" warning from the UI, at least none that is documented or that I've seen (although the long battery life mitigates this). This encourages me to charge more frequently than is really necessary so I don't get surprised. - price is high relative to "regular" non-bike flashlights of this quality, but acceptable given the quality of the mounting solution versus what you'd get by trying to strap a regular torch on the bike *** ASIDE: what's up with the model numbers, Cygolite? *** I have a whole lot of trouble understanding why Cygolite has so many different products. This product supposedly replaces theCygolite Metro 300 , but at the time of this writing that product is still available. Is the 360 brighter? Maybe. But... I compared the 360 here to my 420, and you'd be very hard pressed to tell me which one was "better." I think the 360 illumination pattern is a bit more "even" - the 420 has a couple of "hot spots" which are brighter, but they're more isolated. The 360 is slightly brighter in blinking mode, but it's barely worth mentioning. Physically, at least on the exterior, they are identical. The lettering is printed differently, but the actual shape is the same. The mounting hardware is the same. They both weigh 108 grams (without mounting hardware) according to my scale. My Cygolite Metro 420 also seems discontinued... to be replaced with theCygolite Metro 500 USB Bicycle Headlight . Which Cygolite should you buy? 300? 360? 420? 500? Honestly, I have no idea. Do the model numbers really equate to brightness? If so, at least in my experience, the difference isn't likely to be significant to most people, since I feel the 360 is plenty bright. I picked the 360 since it was at the time of purchase their cheapest model, which seems like as good a criterion as any.