I would not eat at this restaurant again. The service was slow and appalling. The first course was the only decent part of the meal mainly because it was hot (had to ask for soup spoons though). The main course, after waiting an hour (and asking a very disinterested waitress how long it would be) arrived lukewarm. When telling the waitress about it she just said it shouldn't be and walked off!

People are spending a lot of hard earned money for this food. The least they should be able to have is good service and good food. Neither of which was on offer in this restaurant. I will not be recommending Sumosan to anyone else or going there again.

Sumosan is an amazing restaurant! Trust me, if you like exquisite, melt-in-your mouth sushi this place is exactly for you. The tuna sashimi salad was incredible, I definitely recommend it.

The food at Sumosan is superb, not a bit worse than Nobu! Unfortunately it is also not even a bit cheaper. It is worth the money however, if you are a true fan of Japanese cuisine.

I booked this restuarant based on some of the reviews that I had read about it. The evening started off well enough with friendly staff and a few drinks in the bar. However things started to go wrong when only two mains arrived (we were a group of four). I asked one of the waitresses where the other two mains were expecting some sort of explanation. She went off to find out and never returned. I then had to leave my seat to ask another waiter what the deay was. When they did eventually arrive we had been waiting 30 minutes. When the bill arrived i decided that because of the delay that I would only pay half the optional service charge and I told the Waitress this. She then returned the table with teh full amount charged to my card and argued that I should be paying the full amount. I will never return to this restuarant and I suggest that there are better places to go with alot better service.

After reading the lovely reviews about Sumosan I was extremely disappointed. Upon arriving the service (which we eventually got 1hr late) was poor. Despite there being an abundance in staff they all just seem to walk around ignoring you! I ordered the lobster tepanyaki as recommended by another reviewer on this site. It was not what I expected at all, half of half a lobster, that had obviously been frozen and, from the taste for a long period of time, the 'vegetables' were no better than a spoonful of chop suey from your local Chinese takeaway, all for the bargain price of £30! Crazy! I don't mind paying good money for good food but this was a shambles. Our table did eat a selection of Sushi and Tempura which were lovely, but definitely over priced. They charge you for them 'cutting' the sushi?!!
Sumosan definitely lacked atmosphere, a big thumbs down I'm afraid!