The dual band YX510 PCS/CEL extender works as advertised. I am giving it 4 stars as this is a good product and is working within the specifications in the documentation, but did not exceed my expectations. I purchased this to get my iPhone to work inside my single story stucco house. I blame ATT and Apple for the week reception of the iPhone. I originally got NO bars in my house and would drop all incoming calls as soon as I said hello. I now get 4 bars when in line of sight of the YX510 and it drops off a bar for every wall when not in line of sight. I did the math on the specifications and confirmed that it does a great job within a 30 foot radius (subtract a bar for every wall in between).The installation is basically simple, but take the time to move it around to find the spot where it works the best. Follow all the instructions and pay attention to the 3 status lights. I found that you do NOT want to loop any extra coaxial cable close to the antenna.