When travelers rate a cruise, we can only compare it to others we've been on. For most of us, that means we have a limited perspective from which to judge a cruise, since none of us has traveled on all cruise lines, all ships, or all itineraries.
My limitation in this review of Oceania's Riviera July 4 - 12 cruise from Venice to Athens is that all my eight prior cruising experiences have been on Silversea ships (Spirit, Muse, Whisper and Shadow).
In my case, I found that this Oceania Riviera cruise suffered badly in comparison to my Silversea experiences.
Carpets were stained, woodwork was scratched, bathrooms had no electrical plug-ins. Clearly, the ship needs refurbishing.