"Masu is one of the best all you can eat sushi places around San Mateo…this is mostly because they actually make the sushi when you order it instead of making it in mass quantities and leaving it out until people eat it. Each person orders two items when they are first seated and then the waitress will return once in a while to take additional orders (one item at a time). They usually take their time getting back to your table to take additional orders…I think slow service is restaurant policy so people will have time to get full before trying to order too much food. To take full advantage of the all you can eat deal, I recommend coming here if you have a good two hours for lunch. Also if you really want “all you can eat”, you should flag down any waitress who looks at your table. The all you can eat menu has a pretty big selection including Spider Roll, Super California Roll (it’s a deep fried CA roll), Philadelphia Roll, Tekka Maki, Sake Maki, Hamachi Maki, Unagi Roll, Shrimp Tempura Roll, Chicken Teriyaki, Salmon Teriyaki, Tempura, AND various udons. This place is definitely a good deal if you have lots of time and a big appetite."