I bought the AstroZap and the batteries were dead out of the box. Not a problem, just someone accidentally left the unit switched on when they packed it. I had to open the unit to replace them and saw what is probably the most cheap construction I have ever seen. The switch was intermittent but there was a second Pole so that was easily fixed. Everything was glued in place by great gobs of glue. The light source (LED I think) is not aligned to the pinhole and the resulting Artificial Star is nowhere near uniform in its light. They recommend 200 feet for the distance and I haven't been able to try it for collimation yet.
Apart from that, it's not too bad!
Charles