Did it already. I only got the card originally (years ago) to take advantage of the no interest, which worked out great, and never used it again. But when they sent me an unwanted and unneeded MC, I canceled. I had only kept it originally because Sears is a great place to shop for major purchases.
Yes it is. But you must watch the sales and use the no interest option. I recently bought a craftsman snowblower for $599.00 with no interest for 6 mos. (on the card) and have seen the same machine "on sale" lately for $699.00. So, it pays to compare and wait for the "right" sale too.