Ultimate first-class airline offerings - PHOTO

In an effort to really make it "worth it," airlines have started offering passengers everything from on-board apartments (yes, really) to post-boarding limo rentals and private jet access.We've broken down the top first-class perks to see which carriers offer the best value.EtihadCome December, the Abu Dhabi-based airline is taking luxury a step further with the launch of Residence Class on its Airbus A380 and Boeing B787 Dreamliner aircraft.Lie-flat seats?So passe.Wealthy customers can enjoy three-room apartments while in the air.These suites -- clocking in at around $40,000 for a round-trip flight from Abu Dhabi to London -- will feature a private bedroom, a living room and en suite shower.Passengers looking for a slightly scaled down experience can book a First Apartment -- a private suite with a full-length bed, separate reclining ottoman and access to a bathroom with shower.All suites will come with a private minibar.What really sells "The Residence" is the service.Passengers will get their own Savoy Academy-trained butler, concierge, a chauffeur to get them to and from the airport and a private chef.While guests can order off the a la carte menu, they can also request personalized dishes anytime.EmiratesEmirates has announced similar plans to launch a private, on-board residence, though the details have yet to be released.Still, the Dubai airline has long been at the forefront of in-flight luxury.In 2008, Emirates was the first carrier to install first-class cabins with sliding doors for privacy on their Airbus A380s, A340-500s and on most Boeing 777s.Cabins come with a personal minibar, adjustable lighting, private vanity table, mirror and wardrobe.Guests can avail themselves of a 25-minute "shower spa" treatment (though actual shower time is limited to five minutes).There's also turndown service, where cabin crew convert the seat into a bed with a real mattress.And of course there's the award-winning food.In first class, Emirates focuses on regional menus.Passengers can expect items like Iranian caviar or stir-fried lobster in black bean sauce.Air FrancePassengers craving an extra level of comfort can book Air France's new La Premiere cabin.These mini-suites -- available on the carrier's long-haul Boeing 777-300 aircraft -- feature lie-flat seats that adapt to each passenger's morphology, a 24-inch HD screen (one of the largest available on board), a private wardrobe and an adjustable privacy curtain.There's a reclining ottoman, so guests from other parts of the cabin can visit.Come nighttime, cabin crew will outfit the seat with a mattress and linens from the Sofitel range.Air France has also teamed with an army of Michelin-rated chefs to design its new La Premiere menu. It features gourmet touches from Joël Robuchon, Régis Marcon, Guy Martin, Anne-Sophie Pic and Michel Roth.QantasQantas offers the ubiquitous lie-flat seats, though when it comes time to snooze, cabin crew will set it up as a bed with a sheepskin mattress.The seats also have a range of massage features.The first class "pods" are also roomy, taking up the space of about four economy seats.There are also privacy screens to give passengers that much-needed feeling of seclusion.The real draw, however, is the food.In a bid to make in-flight dining restaurant grade, Qantas has teamed with Australian chef and TV personality Neil Perry to design the menu.Diners can go a la carte or enjoy an eight-course tasting menu.Sommeliers are on hand to recommend wine and champagne pairings.(CNN)Bakudaily.Az