| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 3.35/5 | 4.50/5 |
| Vol 2 | 3.59/5 | 4.50/5 |
| Vol 3 | 3.71/5 | 4.55/5 |
| Vol 4 | 3.51/5 | 4.48/5 |
| Vol 5 | 3.75/5 | 4.57/5 |
| Vol 6 | 3.27/5 | 4.43/5 |
| Vol 7 | 4.03/5 | 4.61/5 |
| Vol 8 | 3.65/5 | 4.52/5 |
| Vol 9 | 4.00/5 | 4.60/5 |
| Vol 10 | 4.09/5 | 4.63/5 |
| Vol 11 | 3.77/5 | 4.56/5 |
| Vol 12 | 4.18/5 | 4.67/5 |
| Overall | 3.74/5 | 4.67/5 |