Super-midsize used to mean about five and a half hours in the air. The Praetor 600 goes about seven, and that is the whole argument for it: trips that used to require a heavy jet now fit into a smaller, cheaper aeroplane. Embraer's own marketing puts London to New York and Dubai to London on the list of sectors it will fly non-stop, which is a strong claim for an aircraft of this size and worth reading carefully.
The cabin is the other reason people ask for it. Six feet of standing height, a flat floor with no dropped aisle, and a cabin altitude of about 5,800 feet at its maximum of 45,000 feet, which is unusually low for the class and is the number you feel after six hours rather than the one on the brochure. It has full fly-by-wire controls, which is rare below the very large jets, and the ride in turbulence is noticeably steadier for it.
Praetors are arranged with licensed commercial operators. The type is relatively new but Embraer has sold well into European charter fleets, so availability is usually better than for the long-range Gulfstreams, and positioning is less often the thing that decides the quote.