The primary benefit of this is security. One thing with most of the thieves is that they are always aiming at the car owner and their property. One thing with keyless entry is that they operate with the message sent to the vehicle. This is important as they will just need to use a button to lock and unlock the car door, trunk and even the engine. Being that they operate with messages you find that it is very hard to compromise. This is not the case with standard keys as they can be copied or simulated for forced entry. With this, you would have managed to keep the thieves far from you and your [property.
Apart from that, this system is convenient. You can try and imagine a situation where you are walking from the shop carrying two bags full of items with a car key in your pocket. It will be very hard to unlock the car trunk, and you will have to put your bags down to unlock the trunk which might give someone an opportunity to run with your goods. On the other hand, you will not have to put the luggage down to unlock the trunk as you will just press the button to unlock it.
Also, it is mistake proof. One thing that you should know is that human beings are destined to forget things at one particular moment. In such situation, one may steal your car, and if it is not stolen, you will have to go back and unlock it even if it is raining. But with keyless entry system you will be in a position to shut the car door even from the house.
Safety is another benefit of keyless entry system. You should know that the car can not only protect you from rain but other disasters as well. One thing for sure is that when someone is following you he may catch up with you when you are still looking for key to unlock your car. Unlike keyless entry which will allow you to unlock the door at a distance and slip into the car.
With this system, you will prevent key damage. One thing with standard keys is that they will always cause a lot of scratches on the keyhole areas. One disadvantage of this is that it will interfere with car paint which will make other parts to look worn out. But with keyless entry your car will be free from scratches since you will be pressing a button to unlock a car door and the paint job will always be intact.