I went to Big Bend national park with this product.  I was using the wilson amplified car cradle and wilson trucker antenna in addition to the amplifier.  No verizon bars at all without the amplifier, but once I placed my phone (droid bionic) in the amplified cradle and turned on the amp I had 2 bars (1X) and was able to make calls.  In addition my wife was able to use here Iphone on ATT with success as well. Data was extremely slow since it was 1X but still worked though intermittently.  Inside the city you won't notice a difference with it on or not, but out in the middle of nowhere where you are in a fringe area it will make all the difference.  Keep in mind that it will not amplify a signal that does not exist, its not going to pull in a signal from a tower that is 50 miles away.  The only thing I found disappointing is that the inside antenna only worked if the phone was within 4 or 5 inches of it, and full signal only when the phone was actually touching it.  I just ditched the inside antenna that came with the amp and replaced it with the wilson cradle I bought separately, it was a perfect fit and works well with the amplifier.  I believe that the cradle has the same electronics as the indoor antenna except that it was the suction cup and cradle arms to hold the phone in place.  I give it 4 stars only because the inside antenna didn't work as well as I would have liked, otherwise I would have give it 5 stars.