I live in New York City about 14 miles north of stations broadcasting from the Empire State Building. I tried indoor antennas, both the Terk HDTVa Indoor Amplified High-Definition Antenna for Off-Air HDTV Reception
and the RCA ANT525 AMPLIFIED ANTENNA, neither of which would pull in stations consistently even when I was constantly moving the antenna to maximize reception. The signal quality was constantly bouncing between 10% and ~80%, so stations were constantly cutting in and out.
I purchased this antenna when it was recommended by the telephone agent at AntennasDirect.com. She recommended it for me over the Antennas Direct DB2 Multi Directional HDTV Antenna
because this one was somewhat less directional, and smaller in size.
All I can say is, WOW. I have 100% signal strength on nearly all channels, with a consistent 85% - 100% signal quality. It pulls in 24 HD stations (more than the ones I tried before) without moving the antenna at all, and with no extra amplification. I am using it as an internal antenna -- it's just placed by the window.
This antenna is worth every penny I paid for it, and more. I cannot recommend it highly enough.