The Premier wasn't necessarily the first seat that put safety first. I think many previous seats also put safety first, but they just weren't as safe as the Premier. And some school bus seats already had seat belts and containment, they just weren't comfortable. Furthermore, I thought Kiel Sitze (or maybe whoever makes the Setra seats) had already designed seats equally as safe as the Premier and much more comfortable, they just weren't offered in North America yet.
Apparently, Greyhound tried to do the right thing, but they must've also done some shady dealing behind the scenes, because even after countless people have complained about the Premier, GLI has ordered nothing but Premiers since 2009. And Premiers now comprise 50% of all GLI seats - a total of approximately 30,000 seats in 600 motorcoaches. In contrast, other original Premier customers, such as IT and ADI, have switched to much superior seats for their latest orders.
Meanwhile, GLI is dumbfounded at why they are losing passengers.