Hello,
thanks for your review.
We are actually sorry you didn't enjoy this experience, because it's one of our bestselling and most (positively) reviewed. As regards the use of a ferry instead of a hydrofoil, it depends on the availability of the day.
Even if tide charts are available a lot of time in advance, they always provide an approximate indication. The levels of tide clearly depend on the actual weather and this is to know only few days in advance.
We hope you enjoyed your meal at the restaurant even if you found it expensive. Capri is a very rich island, so its prices are often a little less cheaper than Naples' in general.
Kind regards