Thanks, that's a good deal ($30K in spending for $600 GC is 2c/$ spent, on top of saving 2c/L). Of course you have to shop at Sears, which can be expensive. OTOH I remember getting a Sears GC from some airline in 1981, it was a $40 GC and we got change for spending <$40.
Note that the Asia Miles transfer is 10:1 or 1 mile for every C$ spent.
=aw