Why bother with buying premium? I was disappointed when I was going really good and then I had to stop. But because of what I had played, I had absolutely no urge to buy premium as I was somewhat satisfied already.
What else would premium offer us (You didn't tell us exactly)? The chance to do the exact same thing but just in 5 more different restaurants under a new name? Personally, I think charging us for the whole game was not a smart move.
I have given you a 7 because I enjoyed what I did play, but you would have gotten a 10 if I could have played the whole thing.