We had been on the Celebrity Equinox and Silhouette before and enjoyed them. As the Infinity had been 'Solsticed' we expected a similar experience. I am not sure how much was to do with the Infinity being an older ship or Celebrity cost cutting but it was not up to the same standard. It felt more like a 3 star cruise than a 4 and a half one. It could be that Celebrity has given away so many free drinks packages they are trying to recoup their money.
We always go Aqua class as we enjoy the Blu restaurant. There is no booking system but we have never had to wait for a table there before. On this cruise, every night except one we were sent to the wine bar to wait, usually for about 25 minutes but one night the estimated time was an hour! This is not acceptable for a restaurant which you pay a premium for. Tempers got very frayed some nights. Once finally in, the food was still good except for the desserts which were not as beautifully presented. However, they ran out of some wine by the glass (due to the drinks packages?) blueberries and mushrooms, why didn't they restock at ports?
Our Aquaclass cabin was not as large and we could not use the balcony due to soot from the chimney stack above, so much for paying extra to be on the top level! The Captain's Club Concierge did arrange for the balcony to be cleaned a few times but it made little difference. She did also arrange for us to have a free meal at Quisine as an apology. The other problem with our room was the rattling from loose fittings keeping us awake at night when the seas were rough. I don't think retrofitting the cabins is the same as purpose building them. A towel under the shower doors helped though!
Some people may like Quisine but although the presentation was fun, we found the dishes to be of variable quality and there was too much of it. We preferred SS United States but even that was not as good as Murano on the Solstice class ships.
Although the staff were pleasant when you saw them, there was a distinct lack of waiters in the bars and cafes meaning you had to go up to the bar yourself to get a drink. The Peroni beer was 3 months past its sell by date.
We enjoyed most of the shows but a lot of activities on board were sales pitches. I went to a talk on Rembrandt but it was mostly about trying to sell his etchings for thousands of dollars!
We also enjoyed the tours although some had very long coach journeys.
After this expereince, I would not go on the Infinity again and would have to read recent reviews to go on the Soltice class ships.