The same open-kitchen concept as Zen.. Clean tables and neatly furnished place. Herbivore offers quite a range of Japanses/Western cuisine, so they do have similar food items that is available from Zen.
I do not recall the exact price, but this set that comes with Soup/bread costs close to $20 after tax.
Nothing really special about the mushroom soup.. Just normal and up the standard. Not suitable for vegans though.
Though the presentation for the western "meaty" set is good, I find the food so-so, and not exactly worth my $20 of spending. If you are a big eater, this serving is not enough to fill.