It seemed like a no-brainier to add this 4 night cruise onto our 16 day Panama Canal cruise for a nice 3 week Back to back enjoyable vacation. Generally speaking, we have found Celebrity subdued as far as guest's behaviors. The bulk of the passengers on this 4 night cruise seemed to be in their 40's and were loud and often drunk. It felt like a frat party much of the time. I see no reason to take another 4 night cruise out of Florida based on what we experienced on this trip. We were not the only guests that noted the vibe; it was the topic of conversation often on the elevators.
As far as the Infinity ship itself, we found it to be in good condition for it's age! It doesn't have quite the same feel as the newer Solstice class ships but well cared for just the same. The main difference in the class of ships for me is the layout of the buffet. It is more awkward to get around and easily see food choices and it was often difficult to find my husband since it doesn't have the same open concept, rather is a long loop.
As far as ports, we loved Key West and we spent most of the day walking around and enjoyed a nice lunch there.
Cabin itself was very quiet, near elevator and had ample storage space. Our neighbor's came in about 1:30am each night with no regard to others sleeping but that didn't bother me as much as the daytime behaviors.
This was our turnaround day for our back to back and Celebrity made the process easy.
Walked around the town for a couple of hours only.