It was super hard. I just tried to remember the last 2-3 recipies the customers wanted and used fast Flo and tried to get them ready ahead of time...barely made it
I have it moderately upgraded with the auto chef, but always use a prep kitchen recipe because...why not? I've been able to get 5 stars without crazy upgrades on all except season 1 level 15 (I'm about half way through season 2)