It just so happens that She Who Must be Obeyed bought one of those before I sat down and built my own. On the plus side - ready to go out of the box. On the negative side - strobe is less intense. Only a variable delay setting. Mains power only. Radio Shack still operates a web store and I'm sure there are other online sources. The parts list is pretty basic and the only tools required are wire snips, soldering iron and a drill. I threw together a quick video of both units side by side for comparison. Clicked through the various flash sequences a couple of times on my home made unit. It's not going to be winning any awards.