Both classes of service present significant savings over a lot of other airline program offerings. (upgradedpoints.com)
SPG points also transfer with a bonus to most other airline programs with a 25 % bonus. (creditwalk.ca)
Credit cards to consider: As with many other airline programs whose only major transfer partner is SPG, the Starwood Amex and the Starwood Business Amex are good options. (thepointsguy.com)