Buying a GPS unit for your car is a windfall for the stressful life at present. You do not have to carry a written address or a map.
Installing the new GPS units for cars can help you search any address, which is difficult to reach without using a map.
Whether you are on a road trip to a far-flung place, are very bad at direction sense, going for a safari or going in an unknown city, all you require is a GPS unit which serve as your friend, and of course a guide too.

GPS is the abbreviated form of global positioning system. It was developed originally for the armed forces for your defense but now it is expansively used as a trailing system for cars and many more objects. The tracking system GPS is based on the satellite network and provides the information of the exact position or location of the objects on an actual time basis.

There are numerous portable cars GPS available in the market nowadays and you have huge variety to choose from. When we compare different GPS units available for cars, it is important to check for some parameters such as---
Ease of installation—it is the main important parameter to be kept in mind. Size of the screen also matters a lot. Go for the smaller screen as the bigger screen shakes more and is difficult to read.
Interface Design
this parameters include the touch screen, bright icons, yellow pages, easy menus, etc.
Co-Pilot
Go for the clear accents and non-robotic voices of the co-pilot.
Price
Before buying, compare the prices of all the devices available in the market.