First experience at Monzo - Saturday late 3pm lunch. We were seated promptly, got our menus and was able to order off their lunch special menu which basically gives you a little add-on side for a few dollars more. As someone else mentioned, there's no explanation of the menu. Better know what you're getting into before you go - you're reading up on it on Yelp obviously.
The place was pretty empty when we were there, and the amount of service was very minimal. So minimal that they didn't bother to clear any of our plates until we had paid and left. This was a little irritating so I started putting our empty bowls on an empty seat just to get it out of my way. Was never offered a water refill either. Service gets a 3/5
Quality of food and value - the make your own negitoro hand roll was a little disappointing. The quality of the chopped up ice cream scooped tuna was subpar and the fresh/real wasabi was somehow really bland. The ikura rice bowl was very lacking in the ikura department, also disappointing. The carbonara udon was a very creative idea - but very very creamy for my taste. The uni udon was also creative and had a decently strong uni taste to it while also being decently creamy. You see a trend here? 3/5 overall for food quality and value. I'd give them a 4/5 for creativity though because this isn't your typical authentic ramen joint by any means. Plus you get to watch the noodle making show.
I probably wouldn't come back here again. Overall value was not there for me and it was not worth the headache trying to find parking here.