I started working at Ikea right before they implemented O4G and I left months after O4G was in full effect and I absolutely hated it.
Because of the new work structure, more than half of the people I was hired on with quit. The new work structure no longer worked with a lot of peoples restricted schedules and conflicted with school and although our personal managers tried to work around the O4G scheduling, it because too much for some to handle.
I was working as a cashier when I was originally hired and by the time that I quit, a yea later, I was fully trained in front line, returns, home delivery, furniture pickup, and as a runner but was getting paid when the cashiers were getting paid which was $2-$3 less than those who were hired in the returns or home delivery department. When I asked for a raise, I was denied one but was still asked to work in the other departments doing just as much work as them for less pay.