To gain a better understanding on how far you hit your clubs, how far hazards and flags are away from can only make shot selection in the long term easier.
Very often the problem with all devices is that it takes a while to get used to them and to trust them.
Having a range finder or GPS for the first time can also lead to slowing down play as players get used to a new device and then to digest and use the data that is provided.
However once you get used to it, connect it with your distances they can knock shots off your game.
GPS VS Range Finder
There is no better of worse just preference. The GPS devices in the form of a watch or bag device can be really helpful and if just showing the front, middle and back yardages can be a quick check on how far you need to go.
The more complex “phone” style devices are amazing and offer up a lot of information and also have the ability to move the target you want to measure. These are fantastic if you are “tech savvy” and can handle this device in a good speed.
Range Finders and lasers work differently and can slow down play, If you are on a tight tree lined courses or even a hilly course finding a target to hit through the range find can be difficult.