Echo Sushi is a great place to go if you want to stuff your face with medium grade sushi. I used to stuff my face with their medium grade sushi all the time. I recently went to stuff my face with their medium grade sushi and it costed me a bit more to do so thanks to inflation - it's OK though, I can't complain about that. Out of all the all you can eat (AYCE) places, this is probably one of the best.
For each of their "dragon" rolls, I would price it out at as a $8 equivalent at a non-AYCE location. I would price out their normal rolls at $4 a roll. Assuming that each dragon roll has a 20% lower 'value' to you than the last (declining balance method), you would need to eat 6 dragon rolls to get your money's worth. Now, the question is - can you eat 6 dragon rolls?
When you get there, be sure to expect the typical AYCE sushi experience. That is, long wait times, lots of rice (which Echo actually doesn't fully pack on the rice relative to some places), and servers who do not give you what you clearly indicated on your order sheet.
Their medium grade sushi would start off as top-medium grade sushi and then come down to lower-medium grade sushi near the end. It was at this location that I was able to crush 12 pieces of Eel Avocado rolls (New York Roll excl. Cream Cheese) in under 9 seconds. I would recommend against getting any hand-rolls (in general and from Echo Sushi) as they are packed with rice and will not allow you to maximize your eating ability for the night.