Here is what Nathan has to say:
5.0 out of 5 stars Very smart design, works great., October 20, 2005
This is my second bug zapper. Took another brand back that didn't work. This zapperhttp://www.amazon.com/Flowtron-BK-40D-Electronic-Insect-Coverage/dp/B00004R9VW/ref=zg_bs_328182011_15 is working great, and that's all thanks to its intelligent design.
Some bug zappers have super small entry holes, and then wimpy little electrodes inside. This zapper is designed to let bugs fly in easily, and it has vertical electrodes that zap bugs. This zapper works really well...in fact the other night it was zapping like crazy because it was hot and the bugs were out. We live in an urban area near a plant nursery, so we'd always have bugs coming in the back door. Now this zapper kills them and attracts them away from our backdoor. Great product!
Last time I checked on March 24, 2012, this was marked down 14%, which will cover tax in some states.