They say that they are migrating their network to DOCSIS 3, which they claim it is the most advanced fiber optic technology, ultra-high speed and optimal performance.
They also claim to have an exclusive fiber optic network, much more advanced than the copper-based infrastructure of the rest of the operators.
It is very sad that ONO use these marketing techniques to confuse their customers. What they have is an HFC network, which will just partly migrated to DOCSIS 3.0 but in any case, it is not a ultra-high speed access network. I agree that is technically better than ADSL but they can not say that it is the most advanced access technology, because it is not true.
They also claim to have an exclusive fiber optic network. I deduce that they are talking about they core network, because they are reaching the final customers with COAX, which is better than a twisted pair but they can not say that the rest of the operators user copper-based technologies and they do not, because COAX is still copper.
Finally, if you have a look at their commercial offer, they just talk about downstream. I can not find any reference to upstream datarate on their website, and I know for sure that they are not going symmetric.
If you choose ONO as your access provider, I would ask the installer to show how fiber looks like 😉