Well folks I finally pulled my finger out and got my wife a case of this for xmas. I also got a case of Port Dock Ginja which is another alcoholic ginger beer.
She has graciously allowed me a few sips so I can post a review here.
The ginger kegs is good stuff. Its only 3% so you can drink a few and not get too hammered. It drinks like a really good naturally brewed ginger beer (like a bundaberg) only with alcohol. Slightly cloudy. Soft drink style of carbonation - no head and plenty of fizz. Plenty of ginger flavour. No malt flavour (though malt is listed in the ingredients) and no hops at all. Great on a hot summers day. The guy at the brewery suggested we try it with a dash of lime. The ginger and lime is really refreshing and a perfect summer drink.
The port dock is a much pricier brew (bout $70 a case but I got it cheap due to a shipping stuff up). Its more of a beer than the ginger kegs. Clear and holds a slight head. It is ever so slightly malty and it does have a very slight touch of hop bitterness. Again olny 3%. Oodles of ginger flavour. Another good drink on a summers day.
Of the two I prefer the Ginger Kegs as to me it is more like a 'proper' ginger beer while the Port Dock is a beer with ginger but not enough of a beer for my taste. A bit of extra hop and malt to make it more like a beer and I think it would be great. Oddly enough my wife prefers the port dock but will happily drink both.