| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.85/5 | 4.56/5 |
| Vol 2 | 3.79/5 | 4.54/5 |
| Vol 3 | 3.57/5 | 4.40/5 |
| Vol 4 | 3.57/5 | 4.47/5 |
| Vol 5 | 3.81/5 | 4.56/5 |
| Vol 6 | 3.74/5 | 4.53/5 |
| Vol 7 | 3.48/5 | 4.45/5 |
| Vol 8 | 3.74/5 | 4.54/5 |
| Vol 9 | 3.72/5 | 4.50/5 |
| Vol 10 | 3.71/5 | 4.52/5 |
| Vol 11 | 3.65/5 | 4.52/5 |
| Vol 12 | 3.47/5 | 4.41/5 |
| Overall | 3.68/5 | 4.56/5 |