If you anticipate leasing GM vehicles it is definitely worth having, not only for the purchase/lease but also for service. You can redeem up to $250 of your earnings each year for Service and Accessories. The earnings are best during that 5% threshold, but keep your eyes open for mail and email offers that are periodically targeted, where you can get bonuses for certain amounts and types of purchases (Groceries, Utility Payments, Etc).
