FLYING BED IS EXPRESSLY DESIGNED FOR THE DIFFICULT NEEDS OF THE HOTEL INDUSTRY
What's special compared to a sommier? It's hygienic, the first thing the customer asks, all the market surveys say it; it is very strong but you can move it without breaking your back, ask the hotel's maid; has a contemporary design, which is what architects want today; has a matching sofa bed, not the usual sad cot as a third bed.
What's the same as a good sommier? Only the price.