Koi Express Sushi & Ramen is a casual eatery known for its sushi, teriyaki bowls, and ramen. Many customers appreciate the reasonable prices, especially during lunch, and the large portions that can often be split into multiple meals. The poke bowls, particularly the Hawaiian Poke bowl, receive high praise for their freshness and flavor. However, the ramen has received mixed reviews; some customers find it lacking in flavor and not served at an ideal temperature. While the tonkatsu ramen and other dishes may not meet everyone's expectations, the crab rangoon and various sushi rolls have been enjoyed by many. The restaurant offers a clean and quiet environment with counter service, although some diners have noted a lack of condiments beyond soy sauce. The staff is described as polite, though the service can be slow at times. Overall, Koi Express is seen as a good spot for a quick meal but may not be the best choice for a special dining experience.