I am learning English construction: quite/just + as … as (также … как и … / настолько же … как и ….).

I have a few sentences with this construction. I would like you, English native speakers, to check this sentences and answer such questions as:
Are these sentences grammatically correct and can be used on exams ?
Can these sentences be used in everyday English speech ?

So there are the sentences:
I’m just as good as you! —  Я так же хорош, как и ты!
Her needs are just as important as yours, if not more so. Её потребности настолько же важны, как и ваши, если не важнее.
Brad is just as good as the others. Брэд так же хорош, как и другие.  
I love this country just as much as you do. Я люблю нашу страну не меньше вас.
Her needs are just as important as yours, if not more so. Её потребности настолько же важны, как и ваши, если не важнее.
I don't see the situation quite as negatively as you do. Мне ситуация не кажется настолько мрачной, как вам.