Hm, there were indeed some problems reported in this thread, but I do not think that any of the claims the company did, were really false. The problems reported are mostly relatively minor issues, and despite them, I think there is currently no other freediving computer which would offer such a wide choice of functions, and additionally at a rather low price.
I'd recommend reading through this thread - I do not think the watch has any other problems than those mentioned here. Nothing really horrible, and to my best knowledge nothing violating the promises the company did. Despite some minor issues, it is functional, and has many more features than any other freediving computer on the market (well, except the Beuchat Mundial computer which is just a clone of F.10).
On my mind the only real problem is the activation depth of 1.2m that is too deep for pool training, but that's the case of most other computers too (often even worse). And that's problem only in very specific situations, and may not concern your diving at all.
I personally know several guys who own the computer, and they are very happy with it in comparison to the computers they owned before (mostly the D3).
EDIT: You write:
(or fortunately - for once more) i realized that all these ADVERTISED features where proved to be just CLAIMS
Can you tell us which feature exactly you heard was not available despite being advertized? So far, I did not see any such complain anywhere, and I can tell you I monitor probably more freedving websites than anyone else. Would love to hear about any such report, and if it turns to be true (what I doubt), I'll change the data sheet in the APNEA.cz review, of course too.