Exceptional. We hired Zach to cater and teach a sushi making class for 6 couples at my house for my wife's birthday. He was incredibly responsive and thoughtful. We emailed and spoke several times in advance of the event about what my expectations for the evening and the types of fish we wanted and what we wanted to make. He also give me a lot of tips on sake -- so I went out and bought several bottles of sake for the guests to do a sake taste testing
He drove down to silicon valley from Sonoma, purchased the fish fresh from his contacts at Fisherman's Wharf, and arrived at our home later than expected but well before the guests, so we had plenty of time. He prepared 3 appetizers for us -- an excellent Japanese beef dish, a poke/ponzu dish and a scallop and moon fish sashimi dish with a coconut sauce. Then he taught the group how to make rolls and we each made several rolls with a wide variety of fish and ingredients that he brought. Zach explained a lot about sushi making, from how he evaluates the fish, how it should be cut, how sushi restaurants operate, what to look for at sushi restaurants, etc. His involvement in the evening beyond just preparing the food really helped make the party a lot of fun.