Crystal firmly embraces the mantra of quality over quantity and consistently tops the rankings for passenger experience despite currently only having four ships in its fleet. Neither of its two larger ships (Crystal Serenity and Crystal Symphony) are particularly new, nor particularly big by modern standards, but both are maintained and operated to the highest possible standards and are a byword for luxury and sophistication amongst those cruisers that are happy to manage without the raft of high-tech facilities that can be found on newer ships. They are complemented by Crystal Esprit (a high end super-yacht accommodating just 62 guests), and the soon to be launched Crystal Endeavour (a high end polar expedition ship accommodating around 200 guests).
Whilst not quite into the realms of hiring a private yacht, Crystal is a line for people that don't mind paying top dollar in exchange for top service. Pretty much everything on board is included, so expect a big initial price tag in exchange for a luxury experience and the peace of mind that you don't need to worry about all the little extras.
Reflecting that ethos, everything about Crystal has a fairly grown up feel to it, and the majority of guests choose the line because they want a calmer and more exclusive atmosphere that they'd find on board a larger ship. Families are made welcome and there are facilities for children, but for the most part you can expect younger cruisers to be in the minority.
Although Crystal has embraced a lot of modern touches, it is definitely at the more traditional end of the spectrum and is marketed more on the basis of the elegant and refined cruise experience on offer than on the basis of having the latest leisure and entertainment facilities.
Maintaining high standards is key to everything about Crystal and with that comes a degree of formality. The line tends to attract those that value quality of service very highly and most of those guests enjoy making the effort in terms of dressing smartly for dinner and maintaining an sophisticated atmosphere around the ship.