This baby has some zap and I can't see anything working better.  It is VERY impressive that the price is inline with other units yet is MADE IN THE USA.  They don't make it clear on the box but it is MADE in the USA if you check the label on the inside of the unit (under the top).  After much research, I chose this one because it had better feedback than a similar priced unit (STINGER) which was made in Mexico.  Using the provided attractant, it worked well for getting the "NOSEEmS" in my back yard.  I have a half acre of land and this puppy arrived just in time to let me enjoy our deck.  Unlike some other units that you can't hear them working, this puppy lets you enjoy the WACK of hearing them die.