| A- to A+ |
Elite, top 1% of all Sportsbooks, Guaranteed safety & quality. |
| B- to B+ |
Good, minimal risk to players funds. Top 10% of all books. |
| C- to C+ |
Average to below average cust. service with some risk to players funds. |
| D- to D+ |
Poor, some risk to players funds. Poor customer service, etc. |
| F to F+ |
Caution, extreme risk to players funds. Possibility of a scam. |
| F- |
Outright scam, book on brink of failure. No chance to recover funds. |