I've been going to Nikolaou for many, many years and am never disappointed. Back in my past I owned a restaurant and they were my supplier, and these days I just go in as a foodie and cook and buy things, and get the same, great and funny customer service. The showroom is a bit tight and chaotic, but the best strategy is just to start at the front and ask for what you want. You will likely run into many of the owners of some of the best restaurants in the city if you hit this place up in the afternoon on a weekday.