I love the concept of this establishment which incorporates not just a fast-food joint but also an Asian supermarket (surprisingly, the prices are not that much different to the Asian supermarkets beside the train station), an area dedicated to live cooking demonstrations and a charging point for your all important tech gadgets.
It is located in the Main Train Station where the long-distance ticket office used to be. I can't for the dear life of me understand why they have covered up the original mosaic ceiling; they should have used it as a feature and it would have given the place more character instead of its modern clinical feel.
There is no table service so to order you need to go to the till, grab a drink from the fridge (or shop), order and pay on the spot. They'll give you a round contraption with sounds and lights which will flash and ring once your order is ready for collection. I love this system, it is much better than the typical tannoy system where they call out your name, normally incorrectly.
Taking into the account the kind of place you are in: do you really expect to dine on high-end quality sushi? Most probably not; if anything you'd expect something more akin to low-quality run-of-the-mill fare. The food may not be mindblowing or give you a foodgasm (food orgasm) but I can assure you it is much better than the typical Japanese food you can expect to find in many of the Asian Buffet-Style restaurants in the city. Also, it is cheap as chips!
As it's open all day, it's a perfect place to grab something to eat when everywhere else is no longer serving food and especially good for tourists who are not used to Spanish eating times.
I definitely recommend the gyozas, samosas and octopus uramaki with kikos (toasted corn kernels). On the other hand, I can't recommend the soups as the stocks are not flavourful enough but I guess it'll do to warm your cockles, if it ever gets cold! read more