Works perfect only with one Issue
As many persons have already given its one drawback that its laser beams are nog wider enough. If your cars are really wider than normal in our garage then this won't work for you.

Besides this only one problem it works perfect and recommended for all.

Just what we needed
I have had this installed for over a year with no issues. Works very well. We actually use both lasers to park one car (a minivan) by lining them up at two distances. This helps line the van up early, then gives a dot at which to stop.

Good parking aid, but.......
A good parking aid, but it could use greater sideway adjustment. I would buy it again.

Very useful device
Does what it is intended to do. We have two cars in a fairly new house (I don't know what the ceiling height is), but I had no problem directing the lasers where they need to go.

I suspect if you have a truck/SUV/van that is higher off the ground and/or a lower garage ceiling you may run into difficulty with the ability to spread the lasers out far enough. The comments regarding the duration the device is on for are correct probably around 10 seconds but it has never been a problem for me. I don't know how long it takes for these other people to park and or if they are backing in or not. The motion detector responds to heat that is moving. The car's hot engine/hood coming into the garage was always enough to keep it on.

Install it behind the cars!
Have you people thought of installing this device above and BEHIND the cars so the laser is aimed at your hood from the door area of the garage and not the front end of your car area? This should give you more divergence. Let me know if it works;-)