Pros: Once installed properly, it is fully automatic.
Gives you real and quite precise distance reading with hint of direction.
Audible warnings that give you hints how close objects are so you don't have to look the display but can turn your head backwards.

Cons: Cables are bit short for larger car but you can always extend them.
Beeping sound is bit loud but you can lower the volume it by sticking something in speaker hole.
Smaller bushes or other non smooth smaller objects may not show.

Other Thoughts:

Bottomline: For that price it is best solution available and it really works.

Pros: I was afraid this kit would feel cheap on my car, but turned out it really looks very, very good.
Cables aren't short as other reviewers are stating, guess they are just trying to put central unit in front of the car instead of the trunk.
Display unit cable is very long and it is able to do a couple turns until fit car's console easely. Buzzer is quite high but a single silicon gut in the buzz hole does the trick and makes it the perfect volume.
Sensors do fit tight on the holes -- drill included -- and on a black painted car, it looks almost as an authentic, original product.

Cons: So far, none.

Other Thoughts: Distances shown on display unit are in meters. US citizens may find this annoying as they don't use metric system.

Bottomline: Recommended to anyone who parks his/her car. Units sold from my car dealer costs 10 times this one and have no display. Guess their customers doesn't know DX.

Pros: I expected something that was indeed only worth 29$, but I was pleasantly surprised with this kit. The beeper was mounted inside the display, and didnt need an extra cable. Beeper and display are clear and don't look cheap. The unit detects even small objects, as long as they're somewhat flat.

Cons: One could complain about the cable lenght, but that's easily solved if you're a little handy. I would have preferred a display that would be flat on top also, so I could also stick it underneath the dash instead of on top. I think I'll end up disassembling the display and fitting the components into empty slots in the center console of my car for ultimate customization. The manual isn't very clear, but also unneeded. It might have mentioned that the two left and two right sensors (both sets at the rear or front/rear bumper) show the nearest oblject only: the possiblity to choose between the two setups could have been more elaborated.

Other Thoughts: You can either mount all four sensors in the rear bumper and connect the power cable to the reversing light for full-auto operation, or mount two sensors in the rear bumper and two in the front one, but then you'll need a little switch to keep it from beeping and flashing while you drive.

Bottomline: If your vehicle doesn't come with this option as standard, get it. Any fender-bender costs more than this unit.

Pros: The device is sufficiently sensitive that it picks up obstacles easily (sometimes too easily);
Looking at the product photos, I thought that the LED Display panel would be bulky and make an ugly addition to my car's dashboard. But I was pleasantly surprised that it was small to be unobtrusive.
The sensors seem sturdy enough to stand bumpy rides and the elements.
- The distance sensor is quite accurate. It will detect distance from about 2.5 meters down to 30cm.

Cons: - The sensors' wires are not long enough for my big car that I had to locate the main console somewhere behind the front seat. The version I received had the speaker built-in inside the main console so I needed to pick just the right location for it so that the beeps would be audible. Having short wires made the task a bit of a challenge.
- The sensors will not detect distance within a foot (30cm) and it will indicate zero distance. It would be more useful if it could detect smaller distances up to maybe 10cm. But that's not a major complaint.
- The device has 4 sensors but it will only indicate left and right, that is, you'll not get a sense of the obstacle's location if it's in the middle. It will still display as left or right.

Other Thoughts: The version I received is not paintable, as far as I can test. Well, I didn't paint the sensors directly but I wrapped them in clear plastic and sprayed a very thin coat of paint. Thereafter, the sensor became blind.

Bottomline: This is a very useful product, easy to install but only if you have the aptitude for it and know your way around power tools and electrical car wiring.