Boy, these are just great! I bought two, back in November. One for hubby's car, one for mine. I got caught on icy mountain roads shortly after mine arrived and had to call a tow truck. I had my FlareAlert in the trunk of the car and had to slip-slide my way around to fetch it and one of my hazard sticks. Well that taught me a lesson to always have it within arm's reach, so I don't necessarily have to exit the vehicle to put it to use. It's not always safe to be walking around outside. When on a freeway with a lot of traffic going by, it's best not to get out at all. And, in this case with the ice and all, the car could have started sliding backwards on the ice, while I fiddled around in the trunk, or I could have slipped and hurt myself just groping my way to the back of the car and back.The second time I used it was in March when my car's power steering pump gave out on a long drive home from Toronto. This happened on a busy freeway, at night in the dark. This time I had the FlareAlert nearby and never got out of the car. I switched it on flashing mode and stuck it on top of the car and waited for the tow truck I then called.Both times I told the tow truck drivers that I would have the flashing red light on my car. When asked if the light was easily visible, they both enthusiastically told me that they could see it from way far away and that it really helped to know to look for it. Usually they tend to have to drive more slowly, trying to locate where the distressed car is - especially at night. Both occurrences happened at night.The FlareAlert is well built of very nice, solid plastic. It releases the light very strongly and clearly. The magnet on it is so strong that I have to be careful not to store any electronics near it. Hard drives and memory cards might not react favorably in its proximity...All in all, I am really happy I got this useful gadget and pleased with the way it performs and the service it has already rendered. Everyone should have one nearby in their car. It could be a real life saver! It will definitely save your car's battery while keeping you visible if you are stranded. No need to leave your flashers on if you are concerned about draining your battery (i.e.: if you have to turn your engine off - as I had to do or my car would have overheated). I may get a second one for myself, as I recall worrying that other cars passing by may not see the outer side of my black car at night. I could reach over the passenger seat and put one outside on that side too. Even if it's only attached to the door on that side, it would still give the passing vehicles a better idea as to my car's physical whereabouts. Safer yet that way... Also am keeping some additional batteries on hand - just in case.I recommend this product highly! And I know this whole review sounds a bit like an infomercial, but I am actually in no way affiliated with either the product manufacturers, distributors, or vendors. I just really feel enthusiastic about the usefulness of the product, having had the (unfortunate) occasion to put it to use twice now. Hope you all stay safe - with or without it. :)