I read the original book that came out in 2002.  It's an interesting concept, but I think it's a dangerous game.  If you can get a good arbitrage going for yourself, that's good, but be aware that all the interest payment isn't deductible (ask your CPA), and that if your side investment loses value, or doesn't keep pace with your loan rate, you've got a big problem.

If you're a sophisticated investor, and you know what you're doing... go for it, but life insurance policy is NOT the place to look for your side fund (and a sophisticated investor wouldn't go there anyway).  I am saying this as a licensed insurance agent as well as an RIA.

Life insurance is a great product, and it has many good, financially solid uses, but I don't think this is one of them.  The growth rates those folks project are totally unrealistic.  These folks make a TON of money selling this stuff, and I'm afraid a lot of trusting people are going to get hurt.

 Just my $0.02