I'd appreciate any review.

Topic - Public transportation is a great way to travel, particularly within a metropolis. The Shanghai metro is the most convenient way to get around the city. Do you agree or disagree?
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Some metropolis nowadays are getting so huge and crowded that makes public transportation the best option to move around. Considering the developed cities like Shangai, it is totally agreed that public transportation like train is the best way to get around due to it safety and comfortability.
Firstly, by using a train the chances you got to have an accident or be stolen are almost null. For example if you use you own car to drive inside a crowded city you will probably face traffic jams, reckless imprudences, robbers trying to ambush you at traffic lights. However if you use a public transport all these incidents could be avoided. Although drive your own car give you more flexibility, take a train will increase significantly your security.
Secondly, you don't need to know which direction take to arrive in your destination, all you have to do is sit down and relax. Due to this fact most of people after a long day of activities prefer to use a public transport to reach their destination, preventing all the stress they may have by driving their own vehicle.
In summary, public transportation provides many advantages related to security and wellness, specially in wealthy cities which are more likely to have a high quality public transport system. Moreover, if you are a tourist, as you may not know the directions, a train might be a perfect guide in this case. Therefore it is clearly one of the best options to travel particularly within a metropolis.