czy tak mozna powiedziec?

Hej,
czy to jest poprawne This is really good, actually I think that it's even better than the original?
podrawiam!

tak

przecinki tez w porzadku?

Good question. Although I'm not an authority, I think the sentence may be better punctuated.

This is really good. Actually, I think that it's even better than the original.
Actually - sentene adverb
This is really good; I actually think that it's even better than the original.
actually - mid position

Put in one sentence:

This is really good and I actually think that it's even better than the original.

There are many more possibilities, depending on style.

a ktore brzmi najlepiej/jest najlepsze stylistycznie? :)