Kibou sushi in Cheltenham is an amazingly quaint and beautiful place to eat. The sushi is delicious and the portions just seem...right.
I've been for dinner a couple of times and lunch three times. Dinner is fantastic and everything on the menu is worth trying if you get a chance. However, I always get at least one special as I like trying something different.
Lunch is great value with a bento box priced at under £10 (correct at time of writing). It includes, rice, 2 bits of sushi, salad, something fried (fish, meat or veg) and more.
I would recommend getting a bento box at lunch time and sharing something else on the menu between 2 people.