Gyutaro reminds me of the fast food Restaurants in Japan. It's super cheap (around 6.50-9$ a dish), but unfortunately the taste and proportions don't match.
You order though a tablet, which is a horrible experience, the servers were nice about it though. I recommend they cut it out all together. Dishes are hard to find, and the tablet lagged on us twice. The environment is pretty cute and clean.
Food wise, I got the beef don(6.50), despite it being so low cost, it was not great. The meat portions were so small, and taste wise was mediocre. The curry don also tasted really mediocre. We got the kimchi fries which was nothing special. The okonomoyaki and Takoyaki were the only dish I'd say is pretty good. As part of the Yelp combo deal (check in for deal), we got free dessert which was matcha ice cream - you can't go wrong with it.