I have been to Souplantation a number of times, I think it is okay, I think it is fairly difficult to get $9 of value out of lettuce and carrots and cucumbers, or $12 of value out of lettuce and cucumbers and a bowl of soup. But I thought their food was clean and fresh.
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Like you, I visited Souplantation several times...Most of the time, I used the discount coupons. I did not want to go to Souplantation and pay the full price...
I went to Hometown Buffet and Golden Corral more frequently...
My issue with the places that you mentioned, and likewise, Boston Market is that they are carbs carbs carbs. Huge starch joints.
Hometown Buffet used to be a restaurant that a group of naturists (nudists) when to after our monthly swim/games event at the Y. The management of the restaurant knew and they had a table set up for about 40 of us. Miss them...