I have not had anything to do with CBA's loan but have had some experience with Macquarie and Leveraged Equities.
These products can work well over the long term if the right stocks are picked and also have the advantage of requiring little or no up front capital. A recent tax case also went against the ATO allowing the taxpayer a full deduction to interest payments - previously the ATO's view was that only about 80% of the interest was deductible.
The downside of these products is that they can be very expensive to exit early and you can get caught locked into paying interest on a loan for a stock that turns out to be a dog.
I personaly prefer standard marginal lending products.
