We visited London in December 2012, and booked for dinner. It was a great choice, so we decided go back few days after for lunch as we were around doing shopping.
This is a great asian restaurant, with a mix of japanese, thai and chinese dishes. Some sushi selections are really great as well as some japanese soups and fish dishes. I strongly recommend it for a smart casual dining with friends or a romantic date. Very good service, excellent food, good list of wines. Also, very easy to reach.
At lunch time it may be easier to find a table, but fo dinner I recommend you to book at least one day in advance.
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