I have one. I use it as a backup to my seatpost tail light mounted on my seat bag, but the only thing it's good for is the Zitzzer pattern grabbing people's attention at night.
ALL of the newer lights, especially those with Day-Flash patterns are far, far better light that will keep you safe night and day and have low-power modes for pacelines.
I use eneloop NiMh batteries in mine and unlike LION cell lights whose protection circuits will shut them off then the battery is close to empty, this light will keep getting dimmer and dimmer, BUT, it won't shut off entirely for a very long time. That's a great feature for a backup light.
I haven't thrown mine out, but I sure wouldn't use it for my primary tail light, I and wouldn't buy another, because there are even better NiMh lights out there now.
I ride the roads of So. California, especially Pacific Coast Highway and out here you take your life in your hands with the way people drive cars! I don't ride at night but I do need a very bright tail light for my weekend morning rides especially along the Coast Highway where cars are flying by you at 60 mph. I haven't seen another cyclist with a brighter tail light than my Superflah Turbo and drivers seem to pay more attention when they come up on my tail. The light's easy to install in a few minutes and it hasn't come loose or fallen off and I like that I can easily unclip it when I clean my bike after a ride. Also the battery life seems outstanding and they're inexpensive to replace. I've run through water puddles and that doesn't seem to affect the light. The only gripe I have is that the mount is a bit flimsy and would be nicer if it was billet aluminum instead of plastic and I wish the light housing was black instead of white. Overall, the Superflash Turbo is an excellent tail light, a fantastic value and a must have for safety.
I purchased 2 of the turbos and they are very bright but on both of them when I got into light rain, they randomly quit working andor wouldn't flash but stay on steady. I called Planet bike and they sent me new ones but the same thing happened yesterday to the 2 new ones. I carried the extra one in case they quit and they both quit when I needed them the most. Planet bike said they have been tested extensively when wet but I was not even in heavy rain- more of a mist. I'm going to try electric taping the bottom where the onoff button is to keep moisture off the on-0ff button but I shouldn't have to.
Wildly bright flasher, like using it for commuting, worry it might blind riders behind me, but I feel safer in traffic. I use it now riding during the day, if riding through tunnels or for late rides running into twilight. Only think I don't like is the clip is on the loose side and the light doesn't stay put on my saddle bag without using a rubber band. That seems cheap. I have a Light and Motion tail light that has a bomber attachment.
This is a high quality bike lite. I have many different el cheapo units that I still use. This Turbo light is real easy to switch from bike to bike, so the older lites will be phased out & sold the flea mkt. soon. The visibility factor is awesome. 1st time out training with the club I was obliged to ask if it was OK to leave it on while in the pace line, (it's really that bright!). Nobody was annoyed & they actually appreciated its use because the turbo flash makes the whole group more visible to passing motorists.
BF (North County Cycle Club)
I use this light as my day light on the back of my bike. The light ls bright enough to still be bright in full sunlight. I usually keep it in flashing mode during all of my day rides, and I have been told by other cyclists and drivers that it is very visible. It is thrifty on its 2-AAA batteries, I can ride for several days, maybe 400 miles, on a set of batteries. I use the light at night in the solid mode, but only if I am riding alone. With others, this light is too bright for following riders (but not for cars). At night I use a pair of regular Planet bike lights on my seat stays, they are mounted lower and aren't in other riders' eyes.
I have a Planet Bike Super flash on my bike and bought the Super Flash Turbo so I would have a back up but the Turbo is now the only one on the bike. It is a extremely bright flash and tremendous visibility in bright day light. I feel very safe running this new tail light.