Is Typescript worth the effort?

Typescript is a scripting language compiled into JavaScript. The development of Microsoft, which, to date, has managed to win and fans and detractors. The main question for beginners, and not only: "Why do I need him?".

Since the articles describing the advantages and disadvantages, the description of the language and examples of the work - shaft, I would like to describe the practical conclusions when working in a fairly large application.

Let's start with the main advantages:
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1. Strong typing
2. Code readability
3. Easier transition from the world of strict typing, rather than directly into JavaScript, in which Dynamics rules
4. JavaScript backward compatibility
5. Broad IDE support

Strong typing

Allows you to more fully describe the properties and methods of objects and classes, which is why there is no need, which, personally, I was wildly annoyed to do a check of all the arguments included in the method or function:

function checkAllMyArgsAgain(check, me, please) {
    if(check && me && please) {
        if(check instanceof CheckObject){
            console.log('!');
        } else {
            console.log('  ...')
        }
        if(me){ } //   .......
    }
}

, TypeScript :

function checkAllMyArgsAgain(check: CheckObject, me: MeObject, please: string): string {
    return '  ?   ? ';
}

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function checkMe(check, me) {
     if(check && me) {
         if(check){ ... }
         if(me){ ... }
     }
}

function andCheckMe(check, me) {
     if(check && me) {
         if(check){ ... }
         if(me){ ... }
     }
}

function andCheckMeToo(check, me) {
     if(check && me) {
         if(check){ ... }
         if(me){ ... }
     }
}

:

function checkMe(check: CheckObject, me: MeObject) {
     console.log('  !');
}
function andCheckMe(check: CheckObject, me: MeObject) {
     console.log(' ');
}
function andCheckMeToo(check: CheckObject, me: MeObject) {
     console.log('    ');
}

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