I got this finally - after being done waiting long enough for AT&T; to provide a femtocell option.Background:I got no signal (0-1 bars) downstairs in our house with my iPhone 3G.Had to run upstairs to use the cellphone - upstairs I got 2-3 bars.I discovered that close the bedroom window upstairs, I got 4 bars,and occasionally 3G in stead of Edge. That part did not matter as muchas I use wireless at home - so no 3G was fine.As I got a decent signal by the upstairs back window, I opened the window and heldthe phone up as high as I could. Was happy to see 4 bars and 3G!So I decided to get this device, as it supposedly can get the strongest signalto the rest of your house.Installation:Got it from amazon, and first tested before final install - I used packing tape to temporarilyattach the antenna to outside wall siding, by the top of the window, 2 feet bellow the gutter.Connected the cable, dropped it down, ran the cable through a window down stairs,connected the device, switched it on. I saw before my eyes in the next few seconds my phonego from 1 bar and Edge to 4 bars and 3G! Knowing I had the basic location right, I did the final install.I attached the antenna to the end of a 2x4 (8 foot long) tied connected the cable.I pushed the 2x4 up the roof without climbing on the roof - just standing on a ladder whereI could just reach up over the edge of the roof above the bedroom window.The antenna was attached at a slight angle so that it'd be vertical (upright) with the 2x4 restingflat on the sloping roof. Due to the 2x4's length, the antenna was further up on the roof,over 8 feet back from the edge. So the bottom end of the 2x4 was about a foot from the edgeof the roof, and the top end about 9 feet back.I screwed the 2x4 through the shingles on to the roof plywood - I used two 8" metal plateswith holes in them to run deck screws into the 2x4 as well as into the roof.I kept the metal plates close to the bottom end - about a foot apart from each other.That way I could reach up and screw them on, not have to climb on the roof.I ran the cable down at the edge of the roof, then down along a gutter pipe (down spout).Drilled a hole in the brick wall, behind a desk in the family room, where I wanted to keep the device.Kept it on the desk with its little antenna pointing up.Connected and turned on again. Now I have 5 bars almost constantly, full 3G!Conclusion:I highly recommend this device. Works as described and now I can use my iPhone downstairs!I check the signal at various times, it is 5 bars most of the time, and sometimes 4 barsin the family room (where the device is), and 3-4 bars in other rooms.Very happy.