Like a lot of other reviewers have stated, there is a hidden cost of using the text-to-speech and a very very high cost if you want to do translation (US$45/hr).
I have rated it lower because the offer, in my opinion, is very misleading because it doesn't really give the full picture of what it will cost to utilize this software to its fullest.
I already have a Google Cloud account so the 'free $300 credit' was used up long ago and again it is misleading to use this $300 credit as a way to say that there's very little cost for using the product.