Works Well in a Limited Area
937324
You have to do some research and planning to make this signal booster work for you.

First, you have to locate the nearest tower that your cell provider uses.  antennasearch.com should help.

Then, you need to find the best location in your attic or outside your building where you can place the external antenna. The antenna is directional and must face the tower.

Next, you need to place the inside antenna in a spot (ideally) 20 feet away from the external antenna. The inside antenna is also directional and should not point toward the external antenna. The inside antenna has limited range and does not work much through walls, floors and ceilings.

Here is what worked for me:  I used antennasearch.com to find my tower. After deciding to mount the external antenna in my attic, I found a two foot long piece of 2 inch plastic drain pipe and used the pipe mount bracket that Wilson includes in their package. This enabled me to pivot the antenna into the exact position facing the tower. Then I screwed the pipe with the antenna mounted on it to a rafter in the attic. I ran the RG 6 cable from the antenna down along the chimney to my basement office. Now I get four or five bars where I previously had no service. The effect is limited and the number of bars falls off quickly after I move 10 feet from the indoor antenna or leave the room.
3436853
Note: I am using this for audio only; I have no idea how well the video function works.

My initial plan upon purchasing my new home was to wire it for multiroom audio.  These work well enough that I probably won't do that any time soon.

I bought these for a party.  I wanted to have at least three zones, the living room, basement, and garage.  Range is decent but keep in mind that each wall will attenuate the signal appreciably.  I have no idea if you could really get hundreds of meters out of these; maybe in an open field but the range in a home will be much less.  When I had the receiver on the close side of the garage, it worked fine, on the far side (3 car, further but no additional walls) it didn't really work at all.

Some things to keep in mind:
These do not have "diversity reception" or anything like that (even cheap wireless mics usually will).  This means that you CANNOT have them at any old angle or position and expect them to work perfectly.  Wireless mics are designed to be tolerant of position and angle, these are not in the slightest.  That's no problem though, just set them up and tweak the position and antenna, and don't move it.
Human bodies will disrupt the signal -- place them so that people aren't likely to walk across the signal path and you'll be fine.
Work best with a strong input signal -- Cellphone headphone jacks are notorious for having weakish output into line in.  If you use one for this, you will need to turn it up more on the receiving end, which means you are turning up the hiss as well.  Use a laptop or place a mixer or preamp after your cellphone to boost the signal.  There is hiss from this system but its not a significant issue if the input signal is strong.
183882
it works but the distance is not that great
2385240
Did not work at all in the family room where our big screen TV is located. Work well when I moved the antenna in one of the other bedrooms against the window but with amplifier. I had to link the big TV then, which was not so bad since the splitter in the attic is located in a place that is very easy to access. So I am good now and get the local channels plus extra with very good reception on both TVs of my home.  Overall I am happy that I bought this product.
1181481
I moved into a new apartment and discovered that I got practically no reception. One bar at best, mostly all dead zones. I could get calls, and sometimes they held okay, but most of the time they dropped or people had trouble hearing me.  Since I do not have a land line phone, this was a huge problem. I purchased the Wilson Electronics Desktop Adjustable Gain Cell Phone Signal Booster because it had decent reviews and I had to try *something*.  I almost shied away because of the price, but I'm glad I didn't.

This signal booster works and works well even in non-optimal conditions. The way this works is there are three parts to the system, connected by coaxial cables.  There's the antenna which needs to be mounted outside, a box that gets the signal and a transmitter that broadcasts it. The instructions that come with the system have some pretty specific instructions for the best ways to place all three of these pieces and how far apart they need to be.

Being in an apartment complex, I'm not able to use the preferred mounting methods of putting the antenna on a pole or even affixing it to an exterior wall and I have no idea where the nearest cell tower is (all things that initially had me worried when I started reading the instructions). My only option was to mount it with zip ties to my patio railing and run the cable in under my patio door, hiding the cord and the rest of the assembly under my couch with the signal transmitter sitting on an end table. It's probably only barely the recommended horizontal distance between antenna and transmitter, and it's almost certainly not the recommended vertical difference since I couldn't mount it any higher than the railing, and yet ... it still works!

Outdoor, where the antenna is my phone only shows one bar of signal. Inside, within a certain radius around the signal transmitter I can get up to four bars. I consider that a definite win.

Because my conditions are so non-optimal the four bar range is a fairly limited circle so I was sure to place the booster where I would mostly be using the phone, but I can get at least two bars throughout most of the apartment. My bedroom is the farthest from the transmitter but I can still usually get at least one bar in most of the room.

My apartment isn't all that large, any larger than it is and I would likely still have some dead zones. So keep in mind that the larger the area you want to cover, the better you'll need to be able to follow their mounting guidelines. Also, since this is an amplifier, I'm pretty sure you need to have at least a little signal for it to work. I don't think it could have helped me if there were no bars outside and it probably would give me an even better result if there were more than one bar. But all I know is it's doing exactly what I need it to do and working out great for me. I haven't had any more problems with dropped calls or people complaining that they can't hear me.
2349750
I bought this as part of a combination with a portable radio to use as a set of inexpensive lightweight TV headphones for my father who is hard of hearing. So not something it is specifically advertised to do but still the same purpose. The reasonably priced dedicated TV units that have bigger headphones would not be comfortable for him.

First tested it with two regular stereos. One is already used for home audio. The other as the receiver. The volume had to be cranked up a bit compared to typical levels but the reception was good for a small battery powered unit. A big antenna certainly helped. However because the device has a limited number of frequencies it fights a bit with radio stations in my area. So if an area is full of stations in the 88/90/106/107 frequencies it might be worth looking at other options that have a bigger range.

Another issue is how good the receiver unit itself is. The second test with the single-battery portable radio obviously has a tiny antenna so there is background hiss. Even standing right next to the TV. Not noticeable when the audio is at a decent level, such as your typical action movie, but during quiet dialog it can be.

If this kind of solution works for my father then I will certainly be looking into better and obviously more expensive options in the future that have clear sound. But for what I needed it to do this is a good little unit for the price. Especially if you already have an old radio laying around collecting dust.
4874413
Purchased these to control our Lab/Blue Tic from jumping on people. It works great in close range around the home but I have noticed It has a limited range to about 100' or so depending on battery. The battery does have pretty good life on it in between charges, im sure it may depends on how often it needs to be used with a particular pet. Ours learned in about a few days. Seller has great customer service too.
4355281
I live in the middle of a rust-belt city, so no indoor antenna will deliver perfect results. This one delivers good results. It was not too expensive, and it gave me the one extra channel I needed to watch local NFL games, so I recommend it, especially to people who aren't surrounded by buildings.  RW&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/The-Tao-Of-Writing-Imagine-Create-Flow/dp/1593374046/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">The Tao Of Writing: Imagine. Create. Flow.</a>
993999
This works well for me but I am in an urban area so my experience does not apply to rural installations.
3820776
I was skeptical whether a passive antenna may work, but gave it a try because my office is inside a cinder brick block building that blocks both cellular tower signal and wifi signal from the access point hub that is only 50 ft away.  I was getting zero bar or sometimes barely 1 bar drifting from cell tower once in awhile, and no wifi signal at all.  After I put the passive antenna next to the window close to the ceiling, and my iPhone is 5 ft away from the antenna, it actually got 2-3 bars in cell signal, and 1-2 bars for wifi.  I did not expect it could give such improvements, pleasantly surprised.  I tried it out at home, where I do get a pretty good cell signal, 4 bars, without the antenna.  I thought it would give me 5 bars with this passive antenna, but it didn't change any signal strength.  So I think it works well for very weak cell signal in dead zones, and bring it up to a level where you can actually get some signal, which is better than nothing before.  But don't expect to give you better signal improvement if you are already in a strong signal area.  So it is a good alternative, without having to use powered antenna amplifier, which is very expensive and require wiring and power source, which is not as portable as this.
2334827
The system is great for use in a small area and provide good sound quality.  However the amount of power produced cannot spread across two rooms.  I enjoy the blue tooth capabilities.
3441391
Pros: Good signal strength in my rural area, always able to block out nearby channels.  Feels well built even though it is very light.  Buttons give positive feedback, nice and clicky.  AUX jack functions as you would expect.  SD Card playback works just fine but could use some kind of folder control (more below).
Cons: The unit has no way to skip between folders.  The unit *does* read from folders in numerical then alphabetical order on the SD Card or USB flashdrive.  Once you've loaded 50 tracks on your SD Card it may take a while if you want to play that last album.  USB function works the same as the SD Card in this respect.

Overall, I like the unit a lot better than other inexpensive FM transmitters I've tried.  I primarily use this via the 3.5mm jack hooked to my phone but I find myself using the SD Card with a few tracks on it more for short trips around town.  I would recommend this for anyone in an area that isn't too over saturated with FM signals, finding an empty band could be much harder.
3102301
This worked pretty well for my needs, but I had to buy a stronger version to get all the channels without them cutting it. This would work way better in a better environment. That being said, I'm right in town, so I shouldn't have issues. I think part of the problem is I'm in an area with some some trees and taller buildings on either side of me. Oh well.
3330063
Works well, does not seem to cover a wide area but I am in the Florida swamps.  Easy to use but also wish the cord was a bit longer.
4587596
works well  if you need a small application area.  I did get a larger one for a larger problem area.
4691678
The unit works as advertised. It is not great in Los Angeles or other large cities crowded with fm stations, but works very well on the road or anywhere there is not a proliferation of fm broadcasts.
2912093
Works great when I don't want my dog in certain areas. Range is a bit small even at max settings you only get about a foot and a half. I would definitely by more.

if your having trouble with pets in trash, the response time is a bit long giving them enough time to take what they want and walk away.