
I find most of their price are pretty expensive. Only the member price reduce it to reasonable. SLS had better deals most of the time.
A Challenger staff explained to me yesterday their 2-year ($30) membership has a guarantee of sorts. For example if you fail to consume $50 worth of discounts over the two years, they will refund you $40 (within six months of membership expiry) which makes it very safe to join their memberships. Car park is $2 off-set from the bill upon $50 or more in purchase.