I enjoyed my dinner out at Feng Sushi. The quality of fish was nice, and the sushi was of a good quality - although slightly unremarkable.
The location in Fulham was very small but clean and orderly. The staff was busy, mostly with take-away orders, but polite. It had a feeling of being not traditionally japanese and the staff and chef were unfamiliar with basic sushi. For example they had scallop sushi, so I asked for a scallop handroll. This seemed rather perplexing to them, and I worried when the sushi chef came out to ask if I would like teriyaki sauce on it. I explained how it was usually made (light japanese mayo, roe, and a little spice) you can also have fresh cucumber. The chef made them very well and I appreciated his time and effort.
Higher quality than Yo Sushi, less expensive than Nobu, and overall very good, yet I am not rushing to go back.
Dinner for two: sushi, tempura, sake: around GBP 70