I got interested in this novel when I read the few chapters of the manga that are out.
When I went on Baka-Tsuki, I saw that the first 5 volumes are "Full Preview".

Is it worth it to read those translation or should I wait for real translation?

In terms of English, it's fine. Might be a couple of grammatical mistakes here and there but it's quite readable and well worth the time.

Thank you

If you want a more in-depth look at how it's actually being "machine translated", go here.

That's the profile page of EnigmaticAxiom, the person who spent a lot of time and put a lot of effort into those "previews". Basically, he wanted to learn the language, and this seemed like a fun and effective way for him to learn.

And he did. Currently, he says he doesn't need the machine anymore. Still needs a dictionary, but hey, there's 2000 freakin' moon-runes you gotta learn to be able to read proficiently, so cut him some slack.