I've had one for a couple of years. I think they will all do what they say they will do, some may be faster I don't know. I forget where I got mine and it doesn't have a name on it, but it was not the very expensive model that is out there. The main problem I have with it is its too sensitive. It will pick up every flash you see and a gazillion more you can't see. Also, I have a rebel XT and I have yet to get a strike with it. Maybe some of the higher dollar cameras out there would be able to get the tail end of a pulsing cg, since they are faster. And of course the only time I use it is during the day... at night I just use bulb setting with a wireless remote. I still have hope that maybe it will work out to get a good daytime shot.... maybe a small storm with not much lightning and I get several cgs that occur at about the same time, which sometimes happens. I've put some black electrical tape over the front off it to cover about 90% of the front window and it's still very sensitive. Next time I use it I'm just going to tape the whole thing over and see if that makes a difference, haha. I don't want it triggering unless I can actually see the bolt, so I need to do some trial and error on it with the tape.