The aggregate rating of MSC Grandiosa is build on scorse given by the following portals:
| Aug / 24 | Sep / 24 | Oct / 24 | ||
| cruisetimetables.com | 3.0 / 44 | 3.0 / 44 | 3.0 / 31 | |
| seascanner.com | 8.1 / 351 | 8.1 / 348 | 8.1 / 343 | |
| cruisemapper.com | 4.0 / 1 | 4.0 / 1 | 4.0 / 1 | |
| cruiseline.com | 4.0 / 68 | 4.0 / 68 | 4.0 / 70 | |
| cruisedirect.com | 5.0 / 5 | / | 5.0 / 5 |
PointNemo.com