I LOVED this restaurant.
I was in Prague for a trip in November 2010 and ate dinner twice here as well as one lunch.
In the evenings you choose from the menu and at lunchtimes they hold a buffet, where you pick what you like and pay by weight.
The selection of food is fantastic, all kinds of fake meat/seitan/tofu dishes, and the value is amazing. I highly recommend this place to any veggies out there!
I also tried the desserts - vegan cakes! amazing!