This was our fifth Carnival cruise and the first aboard the "big" Conquest-class ships. Overall, it was a fun time. I'll hit the high points here.
Buffet - Many reviewers have commented how the buffet is difficult to navigate and very crowded. We also found this to be the case. There are four "main lines" which include both salads and entrees - unlike other ships where the salad is separate. This did cause lots of bottlenecking. There was a separate dessert bar, grill, pizza, and fish and chips counter. There are lots of seats - always managed to find one.
Internet Cafe - The ONLY way to access the Internet cafe is walking through the very large Cigar Bar - it has no other entrance. If you are sensitive to smoke (especially cigar smoke) - you may want to bring your own laptop to avoid having to do this. It's also quite small (for such a big ship) - only 10 stations. Internet quality was hit or miss - sometimes OK, sometimes very slow.