Well, I would categorized BT into three types:

1. 0% Balance Transfer which no interest is imposed thru out the duration nor any admin fees.

2. Reducing Balance where interest is imposed on balance outstanding. E.g. HLB BT and Citibank Ready Credit.

3. Upfront Interest Balance Transfer where you are imposed interest upon approval. E.g. AmBank. This is the most expensive of the three above.

When there is upfront interest, the effective interest will be much higher. For example, the AmBank 8.99% upfront interest is equivalent to effeective interest of 16.38% p.a. Click here to AmBank site to read more.

Same thing for AMFlexi-Pay, interest is charged Upfront and therefore the effective interest is higher.

If you really need to utilize your credit card's credit facility, get a credit card with low interest (there is actually no such card) like Affin or Maybank 2 AMEX where the interest rate is less than 10% on a reducing balance. Best go for 0% and don't pay a sen of interest.

Click here to read my previous article at My Credit Cards where I have shown that Upfront Interest of 8% is no difference from credit card's 17.5% interest.