Alternative to BGP-4 for multihoming?

Radware has a product called Linkproof and claims that it negates the need for BGP-4 and portable IP addresses: http://www.radware.com/product/lproof/Default.htm I have a customer that requires multihoming and they want to use Linkproof and I want them to do BGP-4. Does anyone have any experience using this as an alternative to BGP-4? Thanks, Hank