Hi Londonguy
I'd steer well clear of that product or any other herbals on the net. At best they contain products that won't do anything for you except waste your cash. At worst they can contain undisclosed ingredients that can cause harm.

As you've already mentioned the problem is more likely psychological, which means exploring sex therapy. Taking herbal products (particularly ones like this that have no evidence of any trials or safety testing behind them) won't really address the issue at hand.

Speak to your doc, and if you do want to spend money on a treatment refer yourself direct to a sex therapist.

Hope that helps