Bad sushi, high prices, poor area.
I frequent many sushi bars in the area and I would not recommend this place at all. My usual meal at every sushi restaurant is a chirashi bowl and a spicy tuna roll. A chirashi bowl is a bowl of mixed sashimi on a bed of rice. For me it is always a good way to determine just how good the sushi restaurant because this bowl has almost every type of sashimi you find on their menus - albacore, tuna, salmon, squid, egg, yellowtail, tuna belly, fish eggs, etc.
Now concerning Shimogamo, not only were the portions very small for both the chirashi bowl and the spicy tuna roll, there was absolutely no flavor in the fish, neither did it look fresh. They charge high prices here -the chirashi bowl was $25, the spicy tuna roll was $6.25. The rice in the chirashi bowl was also dry, hard, and not cooked properly to be sushi rice
I would recommend going to Sakana, specifically the location in ahwatukee. Portions are good sized, the fish is fresh, has flavor, and prices are reasonable. A chirashi bowl at Sakana is $16 while a spicy tuna roll is about $6. Also they are always consistent here, which is a huge factor in Japanese restaurants.
If you don't believe give Shimogamo a shot, Sakana in ahwatukee a shot, and then you'll realize how much time, money, and effort you've wasted.