Celebrity Cruises is classified as a "Premium" cruise line, occupying the space between mainstream lines (like Royal Caribbean or Carnival) and ultra-luxury lines (like Silversea). They market themselves as "Modern Luxury," focusing on sophisticated design, high-end culinary programs, and a resort-like atmosphere rather than the "theme park" vibe of larger ships. You won't find water slides or belly-flop contests here; instead, you'll find chic rooftop gardens, martini bars with ice-covered counters, and a focus on wellness and spa treatments. While the atmosphere is refined and "fancy," it is not stuffy—there are no formal "tuxedo nights," but rather a "smart casual" dress code. It is an ideal choice for travelers who want an upscale, adult-oriented experience with excellent service without the five-figure price tag of a true luxury line.