yes , I have GPS system

Hi [이름]!

Wow! GPS is really helpful.

I think it will make our lives easier.

Thanks for sharing your ideas about it.

I hope that you are having a great day.
Teacher Nina

Of course, I have GPS systems. Navigation is one of them.

>> correct
Navigation is most useful thing in my life, when I want to go an unfamiliar place, It gives me alot of help.

>> Navigation is the most useful one for me. When I go to an unfamiliar place, it gives me a lot of help.
>> OR: Navigation is the most useful because when I go to new place, it really helps me a lot.
Once I enter the adress of place, it shows me the way.

>> correct (spelling check: address ^^) 
It is very convenient.

>> correct 

and I have cellphone which contain GPS system.

>> And I have a cellphone which contains a GPS system.
>> OR: I have a cellphone with GPS.
It also has Navigation but, It has more ability.

>> It also has a navigator but it has more features.
When we want to search restaurant which is famous for its dish, It gives the way of it.

>> When we want to search for a restaurant which serves a famous dish, it gives me the way to reach that place.

Some ability can find their partner if they can\'t keep in touch.

>> Some features can find their partner if they can\'t keep in touch.

>> OR: There is also a feature that it helps them find their partner if they can\'t communicate.

It is precautions to cheat with somebody.

>> It is a way to cheat somebody.
>> OR: The bad thing is that you will know if your partner cheats.

This can be weak point in other perspective.

>> This can be the weak point of it.

>> OR: This is the disadvantage of it.

I think it makes us save money and time which are precious for us.

>> correct

>> OR: I think it helps us save money and time which are precious for us.
It doesn\'t have many weak points.

>> It doesn\'t have a lot of disadvantages.

I cant think up even one weak point.

>> I can\'t even think of one.
I think it is revolutionary equipment in human history

>> I think it is a revolutionary equipment in human history.