I've been though three bottles of Siberian Pine Nut Oil and in my opinion it works, but not well enough to warrant the money spent. I've spent over USD$2500 trying various remedies and there are only two that I would personally recommend.
1. Heartburn Free: http://www.iherb.com/ProductDetails.aspx?pid=2181&at=0
2. Reflux Away: http://www.iherb.com/ProductDetails.aspx?pid=4470&at=0
I've been taking both of these for the past two weeks (stopped taking Nexium) and haven't had any reflux whatsoever. I used to take Nexium 40mg every day and sometimes twice a day, so this is heaven for me. If you can only afford one of these, please opt for the first one. It is a god-send.