Your Translation
Advantages: We can think it twice, think the really meaning of the word and not word by word
Disadvantages: We are humans, we can make mistakes.

AT
Advantages: it’s really fast
Disadvantages: It doesn’t give an accurate translation, it translate word by word and not the really meaning

CAT
Advantages: The terms you don’t know you can look them up there
Disadvantages: You must check word by word