Review: My partner and I recently ate at Zest. Neither of us speak German, but the staff were very friendly and helpful (despite us being a little late for our reservation due to a bit of confusion on the tram). They weren't sure if our english debit card would work, but were happy for us to eat first then go to a cash machine if necessary-it's hard to believe some of the reviews here can be accurate as this seems to go beyond good service. The food was also exceptional-very high quality ingredients, cooked with an obvious understanding of flavours and texture which is often missing in vegan and vegetarian restaurants. Although not cheap, you wouldn't expect such a high quality meal to be. Also the food was very filling-we couldn't manage pudding, and other diners were taking doggy bags home. My only complaint would be the no dogs sign.